remove node_modules

51 files changed, 0 insertions, 7491 deletions

diff --git a/node_modules/clean-css/lib/optimizer/hack.js b/node_modules/clean-css/lib/optimizer/hack.js
deleted file mode 100644
index 812b5d5ec..000000000
--- a/node_modules/clean-css/lib/optimizer/hack.js
+++ /dev/null
@@ -1,8 +0,0 @@
-var Hack = {
-  ASTERISK: 'asterisk',
-  BANG: 'bang',
-  BACKSLASH: 'backslash',
-  UNDERSCORE: 'underscore'
-};
-
-module.exports = Hack;
diff --git a/node_modules/clean-css/lib/optimizer/level-0/optimize.js b/node_modules/clean-css/lib/optimizer/level-0/optimize.js
deleted file mode 100644
index 2a56f89c6..000000000
--- a/node_modules/clean-css/lib/optimizer/level-0/optimize.js
+++ /dev/null
@@ -1,6 +0,0 @@
-function level0Optimize(tokens) {
-  // noop as level 0 means no optimizations!
-  return tokens;
-}
-
-module.exports = level0Optimize;
diff --git a/node_modules/clean-css/lib/optimizer/level-1/optimize.js b/node_modules/clean-css/lib/optimizer/level-1/optimize.js
deleted file mode 100644
index 13cfd8c52..000000000
--- a/node_modules/clean-css/lib/optimizer/level-1/optimize.js
+++ /dev/null
@@ -1,676 +0,0 @@
-var shortenHex = require('./shorten-hex');
-var shortenHsl = require('./shorten-hsl');
-var shortenRgb = require('./shorten-rgb');
-var sortSelectors = require('./sort-selectors');
-var tidyRules = require('./tidy-rules');
-var tidyBlock = require('./tidy-block');
-var tidyAtRule = require('./tidy-at-rule');
-
-var Hack = require('../hack');
-var removeUnused = require('../remove-unused');
-var restoreFromOptimizing = require('../restore-from-optimizing');
-var wrapForOptimizing = require('../wrap-for-optimizing').all;
-
-var OptimizationLevel = require('../../options/optimization-level').OptimizationLevel;
-
-var Token = require('../../tokenizer/token');
-var Marker = require('../../tokenizer/marker');
-
-var formatPosition = require('../../utils/format-position');
-var split = require('../../utils/split');
-
-var serializeRules = require('../../writer/one-time').rules;
-
-var IgnoreProperty = 'ignore-property';
-
-var CHARSET_TOKEN = '@charset';
-var CHARSET_REGEXP = new RegExp('^' + CHARSET_TOKEN, 'i');
-
-var DEFAULT_ROUNDING_PRECISION = require('../../options/rounding-precision').DEFAULT;
-
-var WHOLE_PIXEL_VALUE = /(?:^|\s|\()(-?\d+)px/;
-var TIME_VALUE = /^(\-?[\d\.]+)(m?s)$/;
-
-var HEX_VALUE_PATTERN = /[0-9a-f]/i;
-var PROPERTY_NAME_PATTERN = /^(?:\-chrome\-|\-[\w\-]+\w|\w[\w\-]+\w|\-\-\S+)$/;
-var IMPORT_PREFIX_PATTERN = /^@import/i;
-var QUOTED_PATTERN = /^('.*'|".*")$/;
-var QUOTED_BUT_SAFE_PATTERN = /^['"][a-zA-Z][a-zA-Z\d\-_]+['"]$/;
-var URL_PREFIX_PATTERN = /^url\(/i;
-var VARIABLE_NAME_PATTERN = /^--\S+$/;
-
-function isNegative(value) {
-  return value && value[1][0] == '-' && parseFloat(value[1]) < 0;
-}
-
-function isQuoted(value) {
-  return QUOTED_PATTERN.test(value);
-}
-
-function isUrl(value) {
-  return URL_PREFIX_PATTERN.test(value);
-}
-
-function normalizeUrl(value) {
-  return value
-    .replace(URL_PREFIX_PATTERN, 'url(')
-    .replace(/\\?\n|\\?\r\n/g, '');
-}
-
-function optimizeBackground(property) {
-  var values = property.value;
-
-  if (values.length == 1 && values[0][1] == 'none') {
-    values[0][1] = '0 0';
-  }
-
-  if (values.length == 1 && values[0][1] == 'transparent') {
-    values[0][1] = '0 0';
-  }
-}
-
-function optimizeBorderRadius(property) {
-  var values = property.value;
-  var spliceAt;
-
-  if (values.length == 3 && values[1][1] == '/' && values[0][1] == values[2][1]) {
-    spliceAt = 1;
-  } else if (values.length == 5 && values[2][1] == '/' && values[0][1] == values[3][1] && values[1][1] == values[4][1]) {
-    spliceAt = 2;
-  } else if (values.length == 7 && values[3][1] == '/' && values[0][1] == values[4][1] && values[1][1] == values[5][1] && values[2][1] == values[6][1]) {
-    spliceAt = 3;
-  } else if (values.length == 9 && values[4][1] == '/' && values[0][1] == values[5][1] && values[1][1] == values[6][1] && values[2][1] == values[7][1] && values[3][1] == values[8][1]) {
-    spliceAt = 4;
-  }
-
-  if (spliceAt) {
-    property.value.splice(spliceAt);
-    property.dirty = true;
-  }
-}
-
-function optimizeColors(name, value, compatibility) {
-  if (value.indexOf('#') === -1 && value.indexOf('rgb') == -1 && value.indexOf('hsl') == -1) {
-    return shortenHex(value);
-  }
-
-  value = value
-    .replace(/rgb\((\-?\d+),(\-?\d+),(\-?\d+)\)/g, function (match, red, green, blue) {
-      return shortenRgb(red, green, blue);
-    })
-    .replace(/hsl\((-?\d+),(-?\d+)%?,(-?\d+)%?\)/g, function (match, hue, saturation, lightness) {
-      return shortenHsl(hue, saturation, lightness);
-    })
-    .replace(/(^|[^='"])#([0-9a-f]{6})/gi, function (match, prefix, color, at, inputValue) {
-      var suffix = inputValue[at + match.length];
-
-      if (suffix && HEX_VALUE_PATTERN.test(suffix)) {
-        return match;
-      } else if (color[0] == color[1] && color[2] == color[3] && color[4] == color[5]) {
-        return (prefix + '#' + color[0] + color[2] + color[4]).toLowerCase();
-      } else {
-        return (prefix + '#' + color).toLowerCase();
-      }
-    })
-    .replace(/(^|[^='"])#([0-9a-f]{3})/gi, function (match, prefix, color) {
-      return prefix + '#' + color.toLowerCase();
-    })
-    .replace(/(rgb|rgba|hsl|hsla)\(([^\)]+)\)/g, function (match, colorFunction, colorDef) {
-      var tokens = colorDef.split(',');
-      var applies = (colorFunction == 'hsl' && tokens.length == 3) ||
-        (colorFunction == 'hsla' && tokens.length == 4) ||
-        (colorFunction == 'rgb' && tokens.length == 3 && colorDef.indexOf('%') > 0) ||
-        (colorFunction == 'rgba' && tokens.length == 4 && colorDef.indexOf('%') > 0);
-
-      if (!applies) {
-        return match;
-      }
-
-      if (tokens[1].indexOf('%') == -1) {
-        tokens[1] += '%';
-      }
-
-      if (tokens[2].indexOf('%') == -1) {
-        tokens[2] += '%';
-      }
-
-      return colorFunction + '(' + tokens.join(',') + ')';
-    });
-
-  if (compatibility.colors.opacity && name.indexOf('background') == -1) {
-    value = value.replace(/(?:rgba|hsla)\(0,0%?,0%?,0\)/g, function (match) {
-      if (split(value, ',').pop().indexOf('gradient(') > -1) {
-        return match;
-      }
-
-      return 'transparent';
-    });
-  }
-
-  return shortenHex(value);
-}
-
-function optimizeFilter(property) {
-  if (property.value.length == 1) {
-    property.value[0][1] = property.value[0][1].replace(/progid:DXImageTransform\.Microsoft\.(Alpha|Chroma)(\W)/, function (match, filter, suffix) {
-      return filter.toLowerCase() + suffix;
-    });
-  }
-
-  property.value[0][1] = property.value[0][1]
-    .replace(/,(\S)/g, ', $1')
-    .replace(/ ?= ?/g, '=');
-}
-
-function optimizeFontWeight(property, atIndex) {
-  var value = property.value[atIndex][1];
-
-  if (value == 'normal') {
-    value = '400';
-  } else if (value == 'bold') {
-    value = '700';
-  }
-
-  property.value[atIndex][1] = value;
-}
-
-function optimizeMultipleZeros(property) {
-  var values = property.value;
-  var spliceAt;
-
-  if (values.length == 4 && values[0][1] === '0' && values[1][1] === '0' && values[2][1] === '0' && values[3][1] === '0') {
-    if (property.name.indexOf('box-shadow') > -1) {
-      spliceAt = 2;
-    } else {
-      spliceAt = 1;
-    }
-  }
-
-  if (spliceAt) {
-    property.value.splice(spliceAt);
-    property.dirty = true;
-  }
-}
-
-function optimizeOutline(property) {
-  var values = property.value;
-
-  if (values.length == 1 && values[0][1] == 'none') {
-    values[0][1] = '0';
-  }
-}
-
-function optimizePixelLengths(_, value, compatibility) {
-  if (!WHOLE_PIXEL_VALUE.test(value)) {
-    return value;
-  }
-
-  return value.replace(WHOLE_PIXEL_VALUE, function (match, val) {
-    var newValue;
-    var intVal = parseInt(val);
-
-    if (intVal === 0) {
-      return match;
-    }
-
-    if (compatibility.properties.shorterLengthUnits && compatibility.units.pt && intVal * 3 % 4 === 0) {
-      newValue = intVal * 3 / 4 + 'pt';
-    }
-
-    if (compatibility.properties.shorterLengthUnits && compatibility.units.pc && intVal % 16 === 0) {
-      newValue = intVal / 16 + 'pc';
-    }
-
-    if (compatibility.properties.shorterLengthUnits && compatibility.units.in && intVal % 96 === 0) {
-      newValue = intVal / 96 + 'in';
-    }
-
-    if (newValue) {
-      newValue = match.substring(0, match.indexOf(val)) + newValue;
-    }
-
-    return newValue && newValue.length < match.length ? newValue : match;
-  });
-}
-
-function optimizePrecision(_, value, precisionOptions) {
-  if (!precisionOptions.enabled || value.indexOf('.') === -1) {
-    return value;
-  }
-
-  return value
-    .replace(precisionOptions.decimalPointMatcher, '$1$2$3')
-    .replace(precisionOptions.zeroMatcher, function (match, integerPart, fractionPart, unit) {
-      var multiplier = precisionOptions.units[unit].multiplier;
-      var parsedInteger = parseInt(integerPart);
-      var integer = isNaN(parsedInteger) ? 0 : parsedInteger;
-      var fraction = parseFloat(fractionPart);
-
-      return Math.round((integer + fraction) * multiplier) / multiplier + unit;
-    });
-}
-
-function optimizeTimeUnits(_, value) {
-  if (!TIME_VALUE.test(value))
-    return value;
-
-  return value.replace(TIME_VALUE, function (match, val, unit) {
-    var newValue;
-
-    if (unit == 'ms') {
-      newValue = parseInt(val) / 1000 + 's';
-    } else if (unit == 's') {
-      newValue = parseFloat(val) * 1000 + 'ms';
-    }
-
-    return newValue.length < match.length ? newValue : match;
-  });
-}
-
-function optimizeUnits(name, value, unitsRegexp) {
-  if (/^(?:\-moz\-calc|\-webkit\-calc|calc|rgb|hsl|rgba|hsla)\(/.test(value)) {
-    return value;
-  }
-
-  if (name == 'flex' || name == '-ms-flex' || name == '-webkit-flex' || name == 'flex-basis' || name == '-webkit-flex-basis') {
-    return value;
-  }
-
-  if (value.indexOf('%') > 0 && (name == 'height' || name == 'max-height' || name == 'width' || name == 'max-width')) {
-    return value;
-  }
-
-  return value
-    .replace(unitsRegexp, '$1' + '0' + '$2')
-    .replace(unitsRegexp, '$1' + '0' + '$2');
-}
-
-function optimizeWhitespace(name, value) {
-  if (name.indexOf('filter') > -1 || value.indexOf(' ') == -1 || value.indexOf('expression') === 0) {
-    return value;
-  }
-
-  if (value.indexOf(Marker.SINGLE_QUOTE) > -1 || value.indexOf(Marker.DOUBLE_QUOTE) > -1) {
-    return value;
-  }
-
-  value = value.replace(/\s+/g, ' ');
-
-  if (value.indexOf('calc') > -1) {
-    value = value.replace(/\) ?\/ ?/g, ')/ ');
-  }
-
-  return value
-    .replace(/(\(;?)\s+/g, '$1')
-    .replace(/\s+(;?\))/g, '$1')
-    .replace(/, /g, ',');
-}
-
-function optimizeZeroDegUnit(_, value) {
-  if (value.indexOf('0deg') == -1) {
-    return value;
-  }
-
-  return value.replace(/\(0deg\)/g, '(0)');
-}
-
-function optimizeZeroUnits(name, value) {
-  if (value.indexOf('0') == -1) {
-    return value;
-  }
-
-  if (value.indexOf('-') > -1) {
-    value = value
-      .replace(/([^\w\d\-]|^)\-0([^\.]|$)/g, '$10$2')
-      .replace(/([^\w\d\-]|^)\-0([^\.]|$)/g, '$10$2');
-  }
-
-  return value
-    .replace(/(^|\s)0+([1-9])/g, '$1$2')
-    .replace(/(^|\D)\.0+(\D|$)/g, '$10$2')
-    .replace(/(^|\D)\.0+(\D|$)/g, '$10$2')
-    .replace(/\.([1-9]*)0+(\D|$)/g, function (match, nonZeroPart, suffix) {
-      return (nonZeroPart.length > 0 ? '.' : '') + nonZeroPart + suffix;
-    })
-    .replace(/(^|\D)0\.(\d)/g, '$1.$2');
-}
-
-function removeQuotes(name, value) {
-  if (name == 'content' || name.indexOf('font-variation-settings') > -1 || name.indexOf('font-feature-settings') > -1 || name.indexOf('grid-') > -1) {
-    return value;
-  }
-
-  return QUOTED_BUT_SAFE_PATTERN.test(value) ?
-    value.substring(1, value.length - 1) :
-    value;
-}
-
-function removeUrlQuotes(value) {
-  return /^url\(['"].+['"]\)$/.test(value) && !/^url\(['"].*[\*\s\(\)'"].*['"]\)$/.test(value) && !/^url\(['"]data:[^;]+;charset/.test(value) ?
-    value.replace(/["']/g, '') :
-    value;
-}
-
-function transformValue(propertyName, propertyValue, rule, transformCallback) {
-  var selector = serializeRules(rule);
-  var transformedValue = transformCallback(propertyName, propertyValue, selector);
-
-  if (transformedValue === undefined) {
-    return propertyValue;
-  } else if (transformedValue === false) {
-    return IgnoreProperty;
-  } else {
-    return transformedValue;
-  }
-}
-
-//
-
-function optimizeBody(rule, properties, context) {
-  var options = context.options;
-  var levelOptions = options.level[OptimizationLevel.One];
-  var property, name, type, value;
-  var valueIsUrl;
-  var propertyToken;
-  var _properties = wrapForOptimizing(properties, true);
-
-  propertyLoop:
-  for (var i = 0, l = _properties.length; i < l; i++) {
-    property = _properties[i];
-    name = property.name;
-
-    if (!PROPERTY_NAME_PATTERN.test(name)) {
-      propertyToken = property.all[property.position];
-      context.warnings.push('Invalid property name \'' + name + '\' at ' + formatPosition(propertyToken[1][2][0]) + '. Ignoring.');
-      property.unused = true;
-    }
-
-    if (property.value.length === 0) {
-      propertyToken = property.all[property.position];
-      context.warnings.push('Empty property \'' + name + '\' at ' + formatPosition(propertyToken[1][2][0]) + '. Ignoring.');
-      property.unused = true;
-    }
-
-    if (property.hack && (
-        (property.hack[0] == Hack.ASTERISK || property.hack[0] == Hack.UNDERSCORE) && !options.compatibility.properties.iePrefixHack ||
-        property.hack[0] == Hack.BACKSLASH && !options.compatibility.properties.ieSuffixHack ||
-        property.hack[0] == Hack.BANG && !options.compatibility.properties.ieBangHack)) {
-      property.unused = true;
-    }
-
-    if (levelOptions.removeNegativePaddings && name.indexOf('padding') === 0 && (isNegative(property.value[0]) || isNegative(property.value[1]) || isNegative(property.value[2]) || isNegative(property.value[3]))) {
-      property.unused = true;
-    }
-
-    if (!options.compatibility.properties.ieFilters && isLegacyFilter(property)) {
-      property.unused = true;
-    }
-
-    if (property.unused) {
-      continue;
-    }
-
-    if (property.block) {
-      optimizeBody(rule, property.value[0][1], context);
-      continue;
-    }
-
-    if (VARIABLE_NAME_PATTERN.test(name)) {
-      continue;
-    }
-
-    for (var j = 0, m = property.value.length; j < m; j++) {
-      type = property.value[j][0];
-      value = property.value[j][1];
-      valueIsUrl = isUrl(value);
-
-      if (type == Token.PROPERTY_BLOCK) {
-        property.unused = true;
-        context.warnings.push('Invalid value token at ' + formatPosition(value[0][1][2][0]) + '. Ignoring.');
-        break;
-      }
-
-      if (valueIsUrl && !context.validator.isUrl(value)) {
-        property.unused = true;
-        context.warnings.push('Broken URL \'' + value + '\' at ' + formatPosition(property.value[j][2][0]) + '. Ignoring.');
-        break;
-      }
-
-      if (valueIsUrl) {
-        value = levelOptions.normalizeUrls ?
-          normalizeUrl(value) :
-          value;
-        value = !options.compatibility.properties.urlQuotes ?
-          removeUrlQuotes(value) :
-          value;
-      } else if (isQuoted(value)) {
-        value = levelOptions.removeQuotes ?
-          removeQuotes(name, value) :
-          value;
-      } else {
-        value = levelOptions.removeWhitespace ?
-          optimizeWhitespace(name, value) :
-          value;
-        value = optimizePrecision(name, value, options.precision);
-        value = optimizePixelLengths(name, value, options.compatibility);
-        value = levelOptions.replaceTimeUnits ?
-          optimizeTimeUnits(name, value) :
-          value;
-        value = levelOptions.replaceZeroUnits ?
-          optimizeZeroUnits(name, value) :
-          value;
-
-        if (options.compatibility.properties.zeroUnits) {
-          value = optimizeZeroDegUnit(name, value);
-          value = optimizeUnits(name, value, options.unitsRegexp);
-        }
-
-        if (options.compatibility.properties.colors) {
-          value = optimizeColors(name, value, options.compatibility);
-        }
-      }
-
-      value = transformValue(name, value, rule, levelOptions.transform);
-
-      if (value === IgnoreProperty) {
-        property.unused = true;
-        continue propertyLoop;
-      }
-
-      property.value[j][1] = value;
-    }
-
-    if (levelOptions.replaceMultipleZeros) {
-      optimizeMultipleZeros(property);
-    }
-
-    if (name == 'background' && levelOptions.optimizeBackground) {
-      optimizeBackground(property);
-    } else if (name.indexOf('border') === 0 && name.indexOf('radius') > 0 && levelOptions.optimizeBorderRadius) {
-      optimizeBorderRadius(property);
-    } else if (name == 'filter'&& levelOptions.optimizeFilter && options.compatibility.properties.ieFilters) {
-      optimizeFilter(property);
-    } else if (name == 'font-weight' && levelOptions.optimizeFontWeight) {
-      optimizeFontWeight(property, 0);
-    } else if (name == 'outline' && levelOptions.optimizeOutline) {
-      optimizeOutline(property);
-    }
-  }
-
-  restoreFromOptimizing(_properties);
-  removeUnused(_properties);
-  removeComments(properties, options);
-}
-
-function removeComments(tokens, options) {
-  var token;
-  var i;
-
-  for (i = 0; i < tokens.length; i++) {
-    token = tokens[i];
-
-    if (token[0] != Token.COMMENT) {
-      continue;
-    }
-
-    optimizeComment(token, options);
-
-    if (token[1].length === 0) {
-      tokens.splice(i, 1);
-      i--;
-    }
-  }
-}
-
-function optimizeComment(token, options) {
-  if (token[1][2] == Marker.EXCLAMATION && (options.level[OptimizationLevel.One].specialComments == 'all' || options.commentsKept < options.level[OptimizationLevel.One].specialComments)) {
-    options.commentsKept++;
-    return;
-  }
-
-  token[1] = [];
-}
-
-function cleanupCharsets(tokens) {
-  var hasCharset = false;
-
-  for (var i = 0, l = tokens.length; i < l; i++) {
-    var token = tokens[i];
-
-    if (token[0] != Token.AT_RULE)
-      continue;
-
-    if (!CHARSET_REGEXP.test(token[1]))
-      continue;
-
-    if (hasCharset || token[1].indexOf(CHARSET_TOKEN) == -1) {
-      tokens.splice(i, 1);
-      i--;
-      l--;
-    } else {
-      hasCharset = true;
-      tokens.splice(i, 1);
-      tokens.unshift([Token.AT_RULE, token[1].replace(CHARSET_REGEXP, CHARSET_TOKEN)]);
-    }
-  }
-}
-
-function buildUnitRegexp(options) {
-  var units = ['px', 'em', 'ex', 'cm', 'mm', 'in', 'pt', 'pc', '%'];
-  var otherUnits = ['ch', 'rem', 'vh', 'vm', 'vmax', 'vmin', 'vw'];
-
-  otherUnits.forEach(function (unit) {
-    if (options.compatibility.units[unit]) {
-      units.push(unit);
-    }
-  });
-
-  return new RegExp('(^|\\s|\\(|,)0(?:' + units.join('|') + ')(\\W|$)', 'g');
-}
-
-function buildPrecisionOptions(roundingPrecision) {
-  var precisionOptions = {
-    matcher: null,
-    units: {},
-  };
-  var optimizable = [];
-  var unit;
-  var value;
-
-  for (unit in roundingPrecision) {
-    value = roundingPrecision[unit];
-
-    if (value != DEFAULT_ROUNDING_PRECISION) {
-      precisionOptions.units[unit] = {};
-      precisionOptions.units[unit].value = value;
-      precisionOptions.units[unit].multiplier = Math.pow(10, value);
-
-      optimizable.push(unit);
-    }
-  }
-
-  if (optimizable.length > 0) {
-    precisionOptions.enabled = true;
-    precisionOptions.decimalPointMatcher = new RegExp('(\\d)\\.($|' + optimizable.join('|') + ')($|\W)', 'g');
-    precisionOptions.zeroMatcher = new RegExp('(\\d*)(\\.\\d+)(' + optimizable.join('|') + ')', 'g');
-  }
-
-  return precisionOptions;
-}
-
-function isImport(token) {
-  return IMPORT_PREFIX_PATTERN.test(token[1]);
-}
-
-function isLegacyFilter(property) {
-  var value;
-
-  if (property.name == 'filter' || property.name == '-ms-filter') {
-    value = property.value[0][1];
-
-    return value.indexOf('progid') > -1 ||
-      value.indexOf('alpha') === 0 ||
-      value.indexOf('chroma') === 0;
-  } else {
-    return false;
-  }
-}
-
-function level1Optimize(tokens, context) {
-  var options = context.options;
-  var levelOptions = options.level[OptimizationLevel.One];
-  var ie7Hack = options.compatibility.selectors.ie7Hack;
-  var adjacentSpace = options.compatibility.selectors.adjacentSpace;
-  var spaceAfterClosingBrace = options.compatibility.properties.spaceAfterClosingBrace;
-  var format = options.format;
-  var mayHaveCharset = false;
-  var afterRules = false;
-
-  options.unitsRegexp = options.unitsRegexp || buildUnitRegexp(options);
-  options.precision = options.precision || buildPrecisionOptions(levelOptions.roundingPrecision);
-  options.commentsKept = options.commentsKept || 0;
-
-  for (var i = 0, l = tokens.length; i < l; i++) {
-    var token = tokens[i];
-
-    switch (token[0]) {
-      case Token.AT_RULE:
-        token[1] = isImport(token) && afterRules ? '' : token[1];
-        token[1] = levelOptions.tidyAtRules ? tidyAtRule(token[1]) : token[1];
-        mayHaveCharset = true;
-        break;
-      case Token.AT_RULE_BLOCK:
-        optimizeBody(token[1], token[2], context);
-        afterRules = true;
-        break;
-      case Token.NESTED_BLOCK:
-        token[1] = levelOptions.tidyBlockScopes ? tidyBlock(token[1], spaceAfterClosingBrace) : token[1];
-        level1Optimize(token[2], context);
-        afterRules = true;
-        break;
-      case Token.COMMENT:
-        optimizeComment(token, options);
-        break;
-      case Token.RULE:
-        token[1] = levelOptions.tidySelectors ? tidyRules(token[1], !ie7Hack, adjacentSpace, format, context.warnings) : token[1];
-        token[1] = token[1].length > 1 ? sortSelectors(token[1], levelOptions.selectorsSortingMethod) : token[1];
-        optimizeBody(token[1], token[2], context);
-        afterRules = true;
-        break;
-    }
-
-    if (token[0] == Token.COMMENT && token[1].length === 0 || levelOptions.removeEmpty && (token[1].length === 0 || (token[2] && token[2].length === 0))) {
-      tokens.splice(i, 1);
-      i--;
-      l--;
-    }
-  }
-
-  if (levelOptions.cleanupCharsets && mayHaveCharset) {
-    cleanupCharsets(tokens);
-  }
-
-  return tokens;
-}
-
-module.exports = level1Optimize;
diff --git a/node_modules/clean-css/lib/optimizer/level-1/shorten-hex.js b/node_modules/clean-css/lib/optimizer/level-1/shorten-hex.js
deleted file mode 100644
index 3deea381c..000000000
--- a/node_modules/clean-css/lib/optimizer/level-1/shorten-hex.js
+++ /dev/null
@@ -1,189 +0,0 @@
-var COLORS = {
-  aliceblue: '#f0f8ff',
-  antiquewhite: '#faebd7',
-  aqua: '#0ff',
-  aquamarine: '#7fffd4',
-  azure: '#f0ffff',
-  beige: '#f5f5dc',
-  bisque: '#ffe4c4',
-  black: '#000',
-  blanchedalmond: '#ffebcd',
-  blue: '#00f',
-  blueviolet: '#8a2be2',
-  brown: '#a52a2a',
-  burlywood: '#deb887',
-  cadetblue: '#5f9ea0',
-  chartreuse: '#7fff00',
-  chocolate: '#d2691e',
-  coral: '#ff7f50',
-  cornflowerblue: '#6495ed',
-  cornsilk: '#fff8dc',
-  crimson: '#dc143c',
-  cyan: '#0ff',
-  darkblue: '#00008b',
-  darkcyan: '#008b8b',
-  darkgoldenrod: '#b8860b',
-  darkgray: '#a9a9a9',
-  darkgreen: '#006400',
-  darkgrey: '#a9a9a9',
-  darkkhaki: '#bdb76b',
-  darkmagenta: '#8b008b',
-  darkolivegreen: '#556b2f',
-  darkorange: '#ff8c00',
-  darkorchid: '#9932cc',
-  darkred: '#8b0000',
-  darksalmon: '#e9967a',
-  darkseagreen: '#8fbc8f',
-  darkslateblue: '#483d8b',
-  darkslategray: '#2f4f4f',
-  darkslategrey: '#2f4f4f',
-  darkturquoise: '#00ced1',
-  darkviolet: '#9400d3',
-  deeppink: '#ff1493',
-  deepskyblue: '#00bfff',
-  dimgray: '#696969',
-  dimgrey: '#696969',
-  dodgerblue: '#1e90ff',
-  firebrick: '#b22222',
-  floralwhite: '#fffaf0',
-  forestgreen: '#228b22',
-  fuchsia: '#f0f',
-  gainsboro: '#dcdcdc',
-  ghostwhite: '#f8f8ff',
-  gold: '#ffd700',
-  goldenrod: '#daa520',
-  gray: '#808080',
-  green: '#008000',
-  greenyellow: '#adff2f',
-  grey: '#808080',
-  honeydew: '#f0fff0',
-  hotpink: '#ff69b4',
-  indianred: '#cd5c5c',
-  indigo: '#4b0082',
-  ivory: '#fffff0',
-  khaki: '#f0e68c',
-  lavender: '#e6e6fa',
-  lavenderblush: '#fff0f5',
-  lawngreen: '#7cfc00',
-  lemonchiffon: '#fffacd',
-  lightblue: '#add8e6',
-  lightcoral: '#f08080',
-  lightcyan: '#e0ffff',
-  lightgoldenrodyellow: '#fafad2',
-  lightgray: '#d3d3d3',
-  lightgreen: '#90ee90',
-  lightgrey: '#d3d3d3',
-  lightpink: '#ffb6c1',
-  lightsalmon: '#ffa07a',
-  lightseagreen: '#20b2aa',
-  lightskyblue: '#87cefa',
-  lightslategray: '#778899',
-  lightslategrey: '#778899',
-  lightsteelblue: '#b0c4de',
-  lightyellow: '#ffffe0',
-  lime: '#0f0',
-  limegreen: '#32cd32',
-  linen: '#faf0e6',
-  magenta: '#ff00ff',
-  maroon: '#800000',
-  mediumaquamarine: '#66cdaa',
-  mediumblue: '#0000cd',
-  mediumorchid: '#ba55d3',
-  mediumpurple: '#9370db',
-  mediumseagreen: '#3cb371',
-  mediumslateblue: '#7b68ee',
-  mediumspringgreen: '#00fa9a',
-  mediumturquoise: '#48d1cc',
-  mediumvioletred: '#c71585',
-  midnightblue: '#191970',
-  mintcream: '#f5fffa',
-  mistyrose: '#ffe4e1',
-  moccasin: '#ffe4b5',
-  navajowhite: '#ffdead',
-  navy: '#000080',
-  oldlace: '#fdf5e6',
-  olive: '#808000',
-  olivedrab: '#6b8e23',
-  orange: '#ffa500',
-  orangered: '#ff4500',
-  orchid: '#da70d6',
-  palegoldenrod: '#eee8aa',
-  palegreen: '#98fb98',
-  paleturquoise: '#afeeee',
-  palevioletred: '#db7093',
-  papayawhip: '#ffefd5',
-  peachpuff: '#ffdab9',
-  peru: '#cd853f',
-  pink: '#ffc0cb',
-  plum: '#dda0dd',
-  powderblue: '#b0e0e6',
-  purple: '#800080',
-  rebeccapurple: '#663399',
-  red: '#f00',
-  rosybrown: '#bc8f8f',
-  royalblue: '#4169e1',
-  saddlebrown: '#8b4513',
-  salmon: '#fa8072',
-  sandybrown: '#f4a460',
-  seagreen: '#2e8b57',
-  seashell: '#fff5ee',
-  sienna: '#a0522d',
-  silver: '#c0c0c0',
-  skyblue: '#87ceeb',
-  slateblue: '#6a5acd',
-  slategray: '#708090',
-  slategrey: '#708090',
-  snow: '#fffafa',
-  springgreen: '#00ff7f',
-  steelblue: '#4682b4',
-  tan: '#d2b48c',
-  teal: '#008080',
-  thistle: '#d8bfd8',
-  tomato: '#ff6347',
-  turquoise: '#40e0d0',
-  violet: '#ee82ee',
-  wheat: '#f5deb3',
-  white: '#fff',
-  whitesmoke: '#f5f5f5',
-  yellow: '#ff0',
-  yellowgreen: '#9acd32'
-};
-
-var toHex = {};
-var toName = {};
-
-for (var name in COLORS) {
-  var hex = COLORS[name];
-
-  if (name.length < hex.length) {
-    toName[hex] = name;
-  } else {
-    toHex[name] = hex;
-  }
-}
-
-var toHexPattern = new RegExp('(^| |,|\\))(' + Object.keys(toHex).join('|') + ')( |,|\\)|$)', 'ig');
-var toNamePattern = new RegExp('(' + Object.keys(toName).join('|') + ')([^a-f0-9]|$)', 'ig');
-
-function hexConverter(match, prefix, colorValue, suffix) {
-  return prefix + toHex[colorValue.toLowerCase()] + suffix;
-}
-
-function nameConverter(match, colorValue, suffix) {
-  return toName[colorValue.toLowerCase()] + suffix;
-}
-
-function shortenHex(value) {
-  var hasHex = value.indexOf('#') > -1;
-  var shortened = value.replace(toHexPattern, hexConverter);
-
-  if (shortened != value) {
-    shortened = shortened.replace(toHexPattern, hexConverter);
-  }
-
-  return hasHex ?
-    shortened.replace(toNamePattern, nameConverter) :
-    shortened;
-}
-
-module.exports = shortenHex;
diff --git a/node_modules/clean-css/lib/optimizer/level-1/shorten-hsl.js b/node_modules/clean-css/lib/optimizer/level-1/shorten-hsl.js
deleted file mode 100644
index fe98dfd39..000000000
--- a/node_modules/clean-css/lib/optimizer/level-1/shorten-hsl.js
+++ /dev/null
@@ -1,61 +0,0 @@
-// HSL to RGB converter. Both methods adapted from:
-// http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript
-
-function hslToRgb(h, s, l) {
-  var r, g, b;
-
-  // normalize hue orientation b/w 0 and 360 degrees
-  h = h % 360;
-  if (h < 0)
-    h += 360;
-  h = ~~h / 360;
-
-  if (s < 0)
-    s = 0;
-  else if (s > 100)
-    s = 100;
-  s = ~~s / 100;
-
-  if (l < 0)
-    l = 0;
-  else if (l > 100)
-    l = 100;
-  l = ~~l / 100;
-
-  if (s === 0) {
-    r = g = b = l; // achromatic
-  } else {
-    var q = l < 0.5 ?
-      l * (1 + s) :
-      l + s - l * s;
-    var p = 2 * l - q;
-    r = hueToRgb(p, q, h + 1/3);
-    g = hueToRgb(p, q, h);
-    b = hueToRgb(p, q, h - 1/3);
-  }
-
-  return [~~(r * 255), ~~(g * 255), ~~(b * 255)];
-}
-
-function hueToRgb(p, q, t) {
-  if (t < 0) t += 1;
-  if (t > 1) t -= 1;
-  if (t < 1/6) return p + (q - p) * 6 * t;
-  if (t < 1/2) return q;
-  if (t < 2/3) return p + (q - p) * (2/3 - t) * 6;
-  return p;
-}
-
-function shortenHsl(hue, saturation, lightness) {
-  var asRgb = hslToRgb(hue, saturation, lightness);
-  var redAsHex = asRgb[0].toString(16);
-  var greenAsHex = asRgb[1].toString(16);
-  var blueAsHex = asRgb[2].toString(16);
-
-  return '#' +
-    ((redAsHex.length == 1 ? '0' : '') + redAsHex) +
-    ((greenAsHex.length == 1 ? '0' : '') + greenAsHex) +
-    ((blueAsHex.length == 1 ? '0' : '') + blueAsHex);
-}
-
-module.exports = shortenHsl;
diff --git a/node_modules/clean-css/lib/optimizer/level-1/shorten-rgb.js b/node_modules/clean-css/lib/optimizer/level-1/shorten-rgb.js
deleted file mode 100644
index 3c0a5fa31..000000000
--- a/node_modules/clean-css/lib/optimizer/level-1/shorten-rgb.js
+++ /dev/null
@@ -1,10 +0,0 @@
-function shortenRgb(red, green, blue) {
-  var normalizedRed = Math.max(0, Math.min(parseInt(red), 255));
-  var normalizedGreen = Math.max(0, Math.min(parseInt(green), 255));
-  var normalizedBlue = Math.max(0, Math.min(parseInt(blue), 255));
-
-  // Credit: Asen  http://jsbin.com/UPUmaGOc/2/edit?js,console
-  return '#' + ('00000' + (normalizedRed << 16 | normalizedGreen << 8 | normalizedBlue).toString(16)).slice(-6);
-}
-
-module.exports = shortenRgb;
diff --git a/node_modules/clean-css/lib/optimizer/level-1/sort-selectors.js b/node_modules/clean-css/lib/optimizer/level-1/sort-selectors.js
deleted file mode 100644
index 5b261dfb0..000000000
--- a/node_modules/clean-css/lib/optimizer/level-1/sort-selectors.js
+++ /dev/null
@@ -1,23 +0,0 @@
-var naturalCompare = require('../../utils/natural-compare');
-
-function naturalSorter(scope1, scope2) {
-  return naturalCompare(scope1[1], scope2[1]);
-}
-
-function standardSorter(scope1, scope2) {
-  return scope1[1] > scope2[1] ? 1 : -1;
-}
-
-function sortSelectors(selectors, method) {
-  switch (method) {
-    case 'natural':
-      return selectors.sort(naturalSorter);
-    case 'standard':
-      return selectors.sort(standardSorter);
-    case 'none':
-    case false:
-      return selectors;
-  }
-}
-
-module.exports = sortSelectors;
diff --git a/node_modules/clean-css/lib/optimizer/level-1/tidy-at-rule.js b/node_modules/clean-css/lib/optimizer/level-1/tidy-at-rule.js
deleted file mode 100644
index a7b149fb5..000000000
--- a/node_modules/clean-css/lib/optimizer/level-1/tidy-at-rule.js
+++ /dev/null
@@ -1,9 +0,0 @@
-function tidyAtRule(value) {
-  return value
-    .replace(/\s+/g, ' ')
-    .replace(/url\(\s+/g, 'url(')
-    .replace(/\s+\)/g, ')')
-    .trim();
-}
-
-module.exports = tidyAtRule;
diff --git a/node_modules/clean-css/lib/optimizer/level-1/tidy-block.js b/node_modules/clean-css/lib/optimizer/level-1/tidy-block.js
deleted file mode 100644
index 8322aeca7..000000000
--- a/node_modules/clean-css/lib/optimizer/level-1/tidy-block.js
+++ /dev/null
@@ -1,23 +0,0 @@
-var SUPPORTED_COMPACT_BLOCK_MATCHER = /^@media\W/;
-
-function tidyBlock(values, spaceAfterClosingBrace) {
-  var withoutSpaceAfterClosingBrace;
-  var i;
-
-  for (i = values.length - 1; i >= 0; i--) {
-    withoutSpaceAfterClosingBrace = !spaceAfterClosingBrace && SUPPORTED_COMPACT_BLOCK_MATCHER.test(values[i][1]);
-
-    values[i][1] = values[i][1]
-      .replace(/\n|\r\n/g, ' ')
-      .replace(/\s+/g, ' ')
-      .replace(/(,|:|\() /g, '$1')
-      .replace(/ \)/g, ')')
-      .replace(/'([a-zA-Z][a-zA-Z\d\-_]+)'/, '$1')
-      .replace(/"([a-zA-Z][a-zA-Z\d\-_]+)"/, '$1')
-      .replace(withoutSpaceAfterClosingBrace ? /\) /g : null, ')');
-  }
-
-  return values;
-}
-
-module.exports = tidyBlock;
diff --git a/node_modules/clean-css/lib/optimizer/level-1/tidy-rules.js b/node_modules/clean-css/lib/optimizer/level-1/tidy-rules.js
deleted file mode 100644
index d046d0efd..000000000
--- a/node_modules/clean-css/lib/optimizer/level-1/tidy-rules.js
+++ /dev/null
@@ -1,213 +0,0 @@
-var Spaces = require('../../options/format').Spaces;
-var Marker = require('../../tokenizer/marker');
-var formatPosition = require('../../utils/format-position');
-
-var CASE_ATTRIBUTE_PATTERN = /[\s"'][iI]\s*\]/;
-var CASE_RESTORE_PATTERN = /([\d\w])([iI])\]/g;
-var DOUBLE_QUOTE_CASE_PATTERN = /="([a-zA-Z][a-zA-Z\d\-_]+)"([iI])/g;
-var DOUBLE_QUOTE_PATTERN = /="([a-zA-Z][a-zA-Z\d\-_]+)"(\s|\])/g;
-var HTML_COMMENT_PATTERN = /^(?:(?:<!--|-->)\s*)+/;
-var SINGLE_QUOTE_CASE_PATTERN = /='([a-zA-Z][a-zA-Z\d\-_]+)'([iI])/g;
-var SINGLE_QUOTE_PATTERN = /='([a-zA-Z][a-zA-Z\d\-_]+)'(\s|\])/g;
-var RELATION_PATTERN = /[>\+~]/;
-var WHITESPACE_PATTERN = /\s/;
-
-var ASTERISK_PLUS_HTML_HACK = '*+html ';
-var ASTERISK_FIRST_CHILD_PLUS_HTML_HACK = '*:first-child+html ';
-var LESS_THAN = '<';
-
-function hasInvalidCharacters(value) {
-  var isEscaped;
-  var isInvalid = false;
-  var character;
-  var isQuote = false;
-  var i, l;
-
-  for (i = 0, l = value.length; i < l; i++) {
-    character = value[i];
-
-    if (isEscaped) {
-      // continue as always
-    } else if (character == Marker.SINGLE_QUOTE || character == Marker.DOUBLE_QUOTE) {
-      isQuote = !isQuote;
-    } else if (!isQuote && (character == Marker.CLOSE_CURLY_BRACKET || character == Marker.EXCLAMATION || character == LESS_THAN || character == Marker.SEMICOLON)) {
-      isInvalid = true;
-      break;
-    } else if (!isQuote && i === 0 && RELATION_PATTERN.test(character)) {
-      isInvalid = true;
-      break;
-    }
-
-    isEscaped = character == Marker.BACK_SLASH;
-  }
-
-  return isInvalid;
-}
-
-function removeWhitespace(value, format) {
-  var stripped = [];
-  var character;
-  var isNewLineNix;
-  var isNewLineWin;
-  var isEscaped;
-  var wasEscaped;
-  var isQuoted;
-  var isSingleQuoted;
-  var isDoubleQuoted;
-  var isAttribute;
-  var isRelation;
-  var isWhitespace;
-  var roundBracketLevel = 0;
-  var wasRelation = false;
-  var wasWhitespace = false;
-  var withCaseAttribute = CASE_ATTRIBUTE_PATTERN.test(value);
-  var spaceAroundRelation = format && format.spaces[Spaces.AroundSelectorRelation];
-  var i, l;
-
-  for (i = 0, l = value.length; i < l; i++) {
-    character = value[i];
-
-    isNewLineNix = character == Marker.NEW_LINE_NIX;
-    isNewLineWin = character == Marker.NEW_LINE_NIX && value[i - 1] == Marker.CARRIAGE_RETURN;
-    isQuoted = isSingleQuoted || isDoubleQuoted;
-    isRelation = !isAttribute && !isEscaped && roundBracketLevel === 0 && RELATION_PATTERN.test(character);
-    isWhitespace = WHITESPACE_PATTERN.test(character);
-
-    if (wasEscaped && isQuoted && isNewLineWin) {
-      // swallow escaped new windows lines in comments
-      stripped.pop();
-      stripped.pop();
-    } else if (isEscaped && isQuoted && isNewLineNix) {
-      // swallow escaped new *nix lines in comments
-      stripped.pop();
-    } else if (isEscaped) {
-      stripped.push(character);
-    } else if (character == Marker.OPEN_SQUARE_BRACKET && !isQuoted) {
-      stripped.push(character);
-      isAttribute = true;
-    } else if (character == Marker.CLOSE_SQUARE_BRACKET && !isQuoted) {
-      stripped.push(character);
-      isAttribute = false;
-    } else if (character == Marker.OPEN_ROUND_BRACKET && !isQuoted) {
-      stripped.push(character);
-      roundBracketLevel++;
-    } else if (character == Marker.CLOSE_ROUND_BRACKET && !isQuoted) {
-      stripped.push(character);
-      roundBracketLevel--;
-    } else if (character == Marker.SINGLE_QUOTE && !isQuoted) {
-      stripped.push(character);
-      isSingleQuoted = true;
-    } else if (character == Marker.DOUBLE_QUOTE && !isQuoted) {
-      stripped.push(character);
-      isDoubleQuoted = true;
-    } else if (character == Marker.SINGLE_QUOTE && isQuoted) {
-      stripped.push(character);
-      isSingleQuoted = false;
-    } else if (character == Marker.DOUBLE_QUOTE && isQuoted) {
-      stripped.push(character);
-      isDoubleQuoted = false;
-    } else if (isWhitespace && wasRelation && !spaceAroundRelation) {
-      continue;
-    } else if (!isWhitespace && wasRelation && spaceAroundRelation) {
-      stripped.push(Marker.SPACE);
-      stripped.push(character);
-    } else if (isWhitespace && (isAttribute || roundBracketLevel > 0) && !isQuoted) {
-      // skip space
-    } else if (isWhitespace && wasWhitespace && !isQuoted) {
-      // skip extra space
-    } else if ((isNewLineWin || isNewLineNix) && (isAttribute || roundBracketLevel > 0) && isQuoted) {
-      // skip newline
-    } else if (isRelation && wasWhitespace && !spaceAroundRelation) {
-      stripped.pop();
-      stripped.push(character);
-    } else if (isRelation && !wasWhitespace && spaceAroundRelation) {
-      stripped.push(Marker.SPACE);
-      stripped.push(character);
-    } else if (isWhitespace) {
-      stripped.push(Marker.SPACE);
-    } else {
-      stripped.push(character);
-    }
-
-    wasEscaped = isEscaped;
-    isEscaped = character == Marker.BACK_SLASH;
-    wasRelation = isRelation;
-    wasWhitespace = isWhitespace;
-  }
-
-  return withCaseAttribute ?
-    stripped.join('').replace(CASE_RESTORE_PATTERN, '$1 $2]') :
-    stripped.join('');
-}
-
-function removeQuotes(value) {
-  if (value.indexOf('\'') == -1 && value.indexOf('"') == -1) {
-    return value;
-  }
-
-  return value
-    .replace(SINGLE_QUOTE_CASE_PATTERN, '=$1 $2')
-    .replace(SINGLE_QUOTE_PATTERN, '=$1$2')
-    .replace(DOUBLE_QUOTE_CASE_PATTERN, '=$1 $2')
-    .replace(DOUBLE_QUOTE_PATTERN, '=$1$2');
-}
-
-function tidyRules(rules, removeUnsupported, adjacentSpace, format, warnings) {
-  var list = [];
-  var repeated = [];
-
-  function removeHTMLComment(rule, match) {
-    warnings.push('HTML comment \'' + match + '\' at ' + formatPosition(rule[2][0]) + '. Removing.');
-    return '';
-  }
-
-  for (var i = 0, l = rules.length; i < l; i++) {
-    var rule = rules[i];
-    var reduced = rule[1];
-
-    reduced = reduced.replace(HTML_COMMENT_PATTERN, removeHTMLComment.bind(null, rule));
-
-    if (hasInvalidCharacters(reduced)) {
-      warnings.push('Invalid selector \'' + rule[1] + '\' at ' + formatPosition(rule[2][0]) + '. Ignoring.');
-      continue;
-    }
-
-    reduced = removeWhitespace(reduced, format);
-    reduced = removeQuotes(reduced);
-
-    if (adjacentSpace && reduced.indexOf('nav') > 0) {
-      reduced = reduced.replace(/\+nav(\S|$)/, '+ nav$1');
-    }
-
-    if (removeUnsupported && reduced.indexOf(ASTERISK_PLUS_HTML_HACK) > -1) {
-      continue;
-    }
-
-    if (removeUnsupported && reduced.indexOf(ASTERISK_FIRST_CHILD_PLUS_HTML_HACK) > -1) {
-      continue;
-    }
-
-    if (reduced.indexOf('*') > -1) {
-      reduced = reduced
-        .replace(/\*([:#\.\[])/g, '$1')
-        .replace(/^(\:first\-child)?\+html/, '*$1+html');
-    }
-
-    if (repeated.indexOf(reduced) > -1) {
-      continue;
-    }
-
-    rule[1] = reduced;
-    repeated.push(reduced);
-    list.push(rule);
-  }
-
-  if (list.length == 1 && list[0][1].length === 0) {
-    warnings.push('Empty selector \'' + list[0][1] + '\' at ' + formatPosition(list[0][2][0]) + '. Ignoring.');
-    list = [];
-  }
-
-  return list;
-}
-
-module.exports = tidyRules;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/break-up.js b/node_modules/clean-css/lib/optimizer/level-2/break-up.js
deleted file mode 100644
index 5301cb898..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/break-up.js
+++ /dev/null
@@ -1,644 +0,0 @@
-var InvalidPropertyError = require('./invalid-property-error');
-
-var wrapSingle = require('../wrap-for-optimizing').single;
-
-var Token = require('../../tokenizer/token');
-var Marker = require('../../tokenizer/marker');
-
-var formatPosition = require('../../utils/format-position');
-
-function _anyIsInherit(values) {
-  var i, l;
-
-  for (i = 0, l = values.length; i < l; i++) {
-    if (values[i][1] == 'inherit') {
-      return true;
-    }
-  }
-
-  return false;
-}
-
-function _colorFilter(validator) {
-  return function (value) {
-    return value[1] == 'invert' || validator.isColor(value[1]) || validator.isPrefixed(value[1]);
-  };
-}
-
-function _styleFilter(validator) {
-  return function (value) {
-    return value[1] != 'inherit' && validator.isStyleKeyword(value[1]) && !validator.isColorFunction(value[1]);
-  };
-}
-
-function _wrapDefault(name, property, compactable) {
-  var descriptor = compactable[name];
-  if (descriptor.doubleValues && descriptor.defaultValue.length == 2) {
-    return wrapSingle([
-      Token.PROPERTY,
-      [Token.PROPERTY_NAME, name],
-      [Token.PROPERTY_VALUE, descriptor.defaultValue[0]],
-      [Token.PROPERTY_VALUE, descriptor.defaultValue[1]]
-    ]);
-  } else if (descriptor.doubleValues && descriptor.defaultValue.length == 1) {
-    return wrapSingle([
-      Token.PROPERTY,
-      [Token.PROPERTY_NAME, name],
-      [Token.PROPERTY_VALUE, descriptor.defaultValue[0]]
-    ]);
-  } else {
-    return wrapSingle([
-      Token.PROPERTY,
-      [Token.PROPERTY_NAME, name],
-      [Token.PROPERTY_VALUE, descriptor.defaultValue]
-    ]);
-  }
-}
-
-function _widthFilter(validator) {
-  return function (value) {
-    return value[1] != 'inherit' &&
-      (validator.isWidth(value[1]) || validator.isUnit(value[1]) && !validator.isDynamicUnit(value[1])) &&
-      !validator.isStyleKeyword(value[1]) &&
-      !validator.isColorFunction(value[1]);
-  };
-}
-
-function animation(property, compactable, validator) {
-  var duration = _wrapDefault(property.name + '-duration', property, compactable);
-  var timing = _wrapDefault(property.name + '-timing-function', property, compactable);
-  var delay = _wrapDefault(property.name + '-delay', property, compactable);
-  var iteration = _wrapDefault(property.name + '-iteration-count', property, compactable);
-  var direction = _wrapDefault(property.name + '-direction', property, compactable);
-  var fill = _wrapDefault(property.name + '-fill-mode', property, compactable);
-  var play = _wrapDefault(property.name + '-play-state', property, compactable);
-  var name = _wrapDefault(property.name + '-name', property, compactable);
-  var components = [duration, timing, delay, iteration, direction, fill, play, name];
-  var values = property.value;
-  var value;
-  var durationSet = false;
-  var timingSet = false;
-  var delaySet = false;
-  var iterationSet = false;
-  var directionSet = false;
-  var fillSet = false;
-  var playSet = false;
-  var nameSet = false;
-  var i;
-  var l;
-
-  if (property.value.length == 1 && property.value[0][1] == 'inherit') {
-    duration.value = timing.value = delay.value = iteration.value = direction.value = fill.value = play.value = name.value = property.value;
-    return components;
-  }
-
-  if (values.length > 1 && _anyIsInherit(values)) {
-    throw new InvalidPropertyError('Invalid animation values at ' + formatPosition(values[0][2][0]) + '. Ignoring.');
-  }
-
-  for (i = 0, l = values.length; i < l; i++) {
-    value = values[i];
-
-    if (validator.isTime(value[1]) && !durationSet) {
-      duration.value = [value];
-      durationSet = true;
-    } else if (validator.isTime(value[1]) && !delaySet) {
-      delay.value = [value];
-      delaySet = true;
-    } else if ((validator.isGlobal(value[1]) || validator.isTimingFunction(value[1])) && !timingSet) {
-      timing.value = [value];
-      timingSet = true;
-    } else if ((validator.isAnimationIterationCountKeyword(value[1]) || validator.isPositiveNumber(value[1])) && !iterationSet) {
-      iteration.value = [value];
-      iterationSet = true;
-    } else if (validator.isAnimationDirectionKeyword(value[1]) && !directionSet) {
-      direction.value = [value];
-      directionSet = true;
-    } else if (validator.isAnimationFillModeKeyword(value[1]) && !fillSet) {
-      fill.value = [value];
-      fillSet = true;
-    } else if (validator.isAnimationPlayStateKeyword(value[1]) && !playSet) {
-      play.value = [value];
-      playSet = true;
-    } else if ((validator.isAnimationNameKeyword(value[1]) || validator.isIdentifier(value[1])) && !nameSet) {
-      name.value = [value];
-      nameSet = true;
-    } else {
-      throw new InvalidPropertyError('Invalid animation value at ' + formatPosition(value[2][0]) + '. Ignoring.');
-    }
-  }
-
-  return components;
-}
-
-function background(property, compactable, validator) {
-  var image = _wrapDefault('background-image', property, compactable);
-  var position = _wrapDefault('background-position', property, compactable);
-  var size = _wrapDefault('background-size', property, compactable);
-  var repeat = _wrapDefault('background-repeat', property, compactable);
-  var attachment = _wrapDefault('background-attachment', property, compactable);
-  var origin = _wrapDefault('background-origin', property, compactable);
-  var clip = _wrapDefault('background-clip', property, compactable);
-  var color = _wrapDefault('background-color', property, compactable);
-  var components = [image, position, size, repeat, attachment, origin, clip, color];
-  var values = property.value;
-
-  var positionSet = false;
-  var clipSet = false;
-  var originSet = false;
-  var repeatSet = false;
-
-  var anyValueSet = false;
-
-  if (property.value.length == 1 && property.value[0][1] == 'inherit') {
-    // NOTE: 'inherit' is not a valid value for background-attachment
-    color.value = image.value =  repeat.value = position.value = size.value = origin.value = clip.value = property.value;
-    return components;
-  }
-
-  if (property.value.length == 1 && property.value[0][1] == '0 0') {
-    return components;
-  }
-
-  for (var i = values.length - 1; i >= 0; i--) {
-    var value = values[i];
-
-    if (validator.isBackgroundAttachmentKeyword(value[1])) {
-      attachment.value = [value];
-      anyValueSet = true;
-    } else if (validator.isBackgroundClipKeyword(value[1]) || validator.isBackgroundOriginKeyword(value[1])) {
-      if (clipSet) {
-        origin.value = [value];
-        originSet = true;
-      } else {
-        clip.value = [value];
-        clipSet = true;
-      }
-      anyValueSet = true;
-    } else if (validator.isBackgroundRepeatKeyword(value[1])) {
-      if (repeatSet) {
-        repeat.value.unshift(value);
-      } else {
-        repeat.value = [value];
-        repeatSet = true;
-      }
-      anyValueSet = true;
-    } else if (validator.isBackgroundPositionKeyword(value[1]) || validator.isBackgroundSizeKeyword(value[1]) || validator.isUnit(value[1]) || validator.isDynamicUnit(value[1])) {
-      if (i > 0) {
-        var previousValue = values[i - 1];
-
-        if (previousValue[1] == Marker.FORWARD_SLASH) {
-          size.value = [value];
-        } else if (i > 1 && values[i - 2][1] == Marker.FORWARD_SLASH) {
-          size.value = [previousValue, value];
-          i -= 2;
-        } else {
-          if (!positionSet)
-            position.value = [];
-
-          position.value.unshift(value);
-          positionSet = true;
-        }
-      } else {
-        if (!positionSet)
-          position.value = [];
-
-        position.value.unshift(value);
-        positionSet = true;
-      }
-      anyValueSet = true;
-    } else if ((color.value[0][1] == compactable[color.name].defaultValue || color.value[0][1] == 'none') && (validator.isColor(value[1]) || validator.isPrefixed(value[1]))) {
-      color.value = [value];
-      anyValueSet = true;
-    } else if (validator.isUrl(value[1]) || validator.isFunction(value[1])) {
-      image.value = [value];
-      anyValueSet = true;
-    }
-  }
-
-  if (clipSet && !originSet)
-    origin.value = clip.value.slice(0);
-
-  if (!anyValueSet) {
-    throw new InvalidPropertyError('Invalid background value at ' + formatPosition(values[0][2][0]) + '. Ignoring.');
-  }
-
-  return components;
-}
-
-function borderRadius(property, compactable) {
-  var values = property.value;
-  var splitAt = -1;
-
-  for (var i = 0, l = values.length; i < l; i++) {
-    if (values[i][1] == Marker.FORWARD_SLASH) {
-      splitAt = i;
-      break;
-    }
-  }
-
-  if (splitAt === 0 || splitAt === values.length - 1) {
-    throw new InvalidPropertyError('Invalid border-radius value at ' + formatPosition(values[0][2][0]) + '. Ignoring.');
-  }
-
-  var target = _wrapDefault(property.name, property, compactable);
-  target.value = splitAt > -1 ?
-    values.slice(0, splitAt) :
-    values.slice(0);
-  target.components = fourValues(target, compactable);
-
-  var remainder = _wrapDefault(property.name, property, compactable);
-  remainder.value = splitAt > -1 ?
-    values.slice(splitAt + 1) :
-    values.slice(0);
-  remainder.components = fourValues(remainder, compactable);
-
-  for (var j = 0; j < 4; j++) {
-    target.components[j].multiplex = true;
-    target.components[j].value = target.components[j].value.concat(remainder.components[j].value);
-  }
-
-  return target.components;
-}
-
-function font(property, compactable, validator) {
-  var style = _wrapDefault('font-style', property, compactable);
-  var variant = _wrapDefault('font-variant', property, compactable);
-  var weight = _wrapDefault('font-weight', property, compactable);
-  var stretch = _wrapDefault('font-stretch', property, compactable);
-  var size = _wrapDefault('font-size', property, compactable);
-  var height = _wrapDefault('line-height', property, compactable);
-  var family = _wrapDefault('font-family', property, compactable);
-  var components = [style, variant, weight, stretch, size, height, family];
-  var values = property.value;
-  var fuzzyMatched = 4; // style, variant, weight, and stretch
-  var index = 0;
-  var isStretchSet = false;
-  var isStretchValid;
-  var isStyleSet = false;
-  var isStyleValid;
-  var isVariantSet = false;
-  var isVariantValid;
-  var isWeightSet = false;
-  var isWeightValid;
-  var isSizeSet = false;
-  var appendableFamilyName = false;
-
-  if (!values[index]) {
-    throw new InvalidPropertyError('Missing font values at ' + formatPosition(property.all[property.position][1][2][0]) + '. Ignoring.');
-  }
-
-  if (values.length == 1 && values[0][1] == 'inherit') {
-    style.value = variant.value = weight.value = stretch.value = size.value = height.value = family.value = values;
-    return components;
-  }
-
-  if (values.length == 1 && (validator.isFontKeyword(values[0][1]) || validator.isGlobal(values[0][1]) || validator.isPrefixed(values[0][1]))) {
-    values[0][1] = Marker.INTERNAL + values[0][1];
-    style.value = variant.value = weight.value = stretch.value = size.value = height.value = family.value = values;
-    return components;
-  }
-
-  if (values.length < 2 || !_anyIsFontSize(values, validator) || !_anyIsFontFamily(values, validator)) {
-    throw new InvalidPropertyError('Invalid font values at ' + formatPosition(property.all[property.position][1][2][0]) + '. Ignoring.');
-  }
-
-  if (values.length > 1 && _anyIsInherit(values)) {
-    throw new InvalidPropertyError('Invalid font values at ' + formatPosition(values[0][2][0]) + '. Ignoring.');
-  }
-
-  // fuzzy match style, variant, weight, and stretch on first elements
-  while (index < fuzzyMatched) {
-    isStretchValid = validator.isFontStretchKeyword(values[index][1]) || validator.isGlobal(values[index][1]);
-    isStyleValid = validator.isFontStyleKeyword(values[index][1]) || validator.isGlobal(values[index][1]);
-    isVariantValid = validator.isFontVariantKeyword(values[index][1]) || validator.isGlobal(values[index][1]);
-    isWeightValid = validator.isFontWeightKeyword(values[index][1]) || validator.isGlobal(values[index][1]);
-
-    if (isStyleValid && !isStyleSet) {
-      style.value = [values[index]];
-      isStyleSet = true;
-    } else if (isVariantValid && !isVariantSet) {
-      variant.value = [values[index]];
-      isVariantSet = true;
-    } else if (isWeightValid && !isWeightSet) {
-      weight.value = [values[index]];
-      isWeightSet = true;
-    } else if (isStretchValid && !isStretchSet) {
-      stretch.value = [values[index]];
-      isStretchSet = true;
-    } else if (isStyleValid && isStyleSet || isVariantValid && isVariantSet || isWeightValid && isWeightSet || isStretchValid && isStretchSet) {
-      throw new InvalidPropertyError('Invalid font style / variant / weight / stretch value at ' + formatPosition(values[0][2][0]) + '. Ignoring.');
-    } else {
-      break;
-    }
-
-    index++;
-  }
-
-  // now comes font-size ...
-  if (validator.isFontSizeKeyword(values[index][1]) || validator.isUnit(values[index][1]) && !validator.isDynamicUnit(values[index][1])) {
-    size.value = [values[index]];
-    isSizeSet = true;
-    index++;
-  } else {
-    throw new InvalidPropertyError('Missing font size at ' + formatPosition(values[0][2][0]) + '. Ignoring.');
-  }
-
-  if (!values[index]) {
-    throw new InvalidPropertyError('Missing font family at ' + formatPosition(values[0][2][0]) + '. Ignoring.');
-  }
-
-  // ... and perhaps line-height
-  if (isSizeSet && values[index] && values[index][1] == Marker.FORWARD_SLASH && values[index + 1] && (validator.isLineHeightKeyword(values[index + 1][1]) || validator.isUnit(values[index + 1][1]) || validator.isNumber(values[index + 1][1]))) {
-    height.value = [values[index + 1]];
-    index++;
-    index++;
-  }
-
-  // ... and whatever comes next is font-family
-  family.value = [];
-
-  while (values[index]) {
-    if (values[index][1] == Marker.COMMA) {
-      appendableFamilyName = false;
-    } else {
-      if (appendableFamilyName) {
-        family.value[family.value.length - 1][1] += Marker.SPACE + values[index][1];
-      } else {
-        family.value.push(values[index]);
-      }
-
-      appendableFamilyName = true;
-    }
-
-    index++;
-  }
-
-  if (family.value.length === 0) {
-    throw new InvalidPropertyError('Missing font family at ' + formatPosition(values[0][2][0]) + '. Ignoring.');
-  }
-
-  return components;
-}
-
-function _anyIsFontSize(values, validator) {
-  var value;
-  var i, l;
-
-  for (i = 0, l = values.length; i < l; i++) {
-    value = values[i];
-
-    if (validator.isFontSizeKeyword(value[1]) || validator.isUnit(value[1]) && !validator.isDynamicUnit(value[1]) || validator.isFunction(value[1])) {
-      return true;
-    }
-  }
-
-  return false;
-}
-
-function _anyIsFontFamily(values, validator) {
-  var value;
-  var i, l;
-
-  for (i = 0, l = values.length; i < l; i++) {
-    value = values[i];
-
-    if (validator.isIdentifier(value[1])) {
-      return true;
-    }
-  }
-
-  return false;
-}
-
-function fourValues(property, compactable) {
-  var componentNames = compactable[property.name].components;
-  var components = [];
-  var value = property.value;
-
-  if (value.length < 1)
-    return [];
-
-  if (value.length < 2)
-    value[1] = value[0].slice(0);
-  if (value.length < 3)
-    value[2] = value[0].slice(0);
-  if (value.length < 4)
-    value[3] = value[1].slice(0);
-
-  for (var i = componentNames.length - 1; i >= 0; i--) {
-    var component = wrapSingle([
-      Token.PROPERTY,
-      [Token.PROPERTY_NAME, componentNames[i]]
-    ]);
-    component.value = [value[i]];
-    components.unshift(component);
-  }
-
-  return components;
-}
-
-function multiplex(splitWith) {
-  return function (property, compactable, validator) {
-    var splitsAt = [];
-    var values = property.value;
-    var i, j, l, m;
-
-    // find split commas
-    for (i = 0, l = values.length; i < l; i++) {
-      if (values[i][1] == ',')
-        splitsAt.push(i);
-    }
-
-    if (splitsAt.length === 0)
-      return splitWith(property, compactable, validator);
-
-    var splitComponents = [];
-
-    // split over commas, and into components
-    for (i = 0, l = splitsAt.length; i <= l; i++) {
-      var from = i === 0 ? 0 : splitsAt[i - 1] + 1;
-      var to = i < l ? splitsAt[i] : values.length;
-
-      var _property = _wrapDefault(property.name, property, compactable);
-      _property.value = values.slice(from, to);
-
-      splitComponents.push(splitWith(_property, compactable, validator));
-    }
-
-    var components = splitComponents[0];
-
-    // group component values from each split
-    for (i = 0, l = components.length; i < l; i++) {
-      components[i].multiplex = true;
-
-      for (j = 1, m = splitComponents.length; j < m; j++) {
-        components[i].value.push([Token.PROPERTY_VALUE, Marker.COMMA]);
-        Array.prototype.push.apply(components[i].value, splitComponents[j][i].value);
-      }
-    }
-
-    return components;
-  };
-}
-
-function listStyle(property, compactable, validator) {
-  var type = _wrapDefault('list-style-type', property, compactable);
-  var position = _wrapDefault('list-style-position', property, compactable);
-  var image = _wrapDefault('list-style-image', property, compactable);
-  var components = [type, position, image];
-
-  if (property.value.length == 1 && property.value[0][1] == 'inherit') {
-    type.value = position.value = image.value = [property.value[0]];
-    return components;
-  }
-
-  var values = property.value.slice(0);
-  var total = values.length;
-  var index = 0;
-
-  // `image` first...
-  for (index = 0, total = values.length; index < total; index++) {
-    if (validator.isUrl(values[index][1]) || values[index][1] == '0') {
-      image.value = [values[index]];
-      values.splice(index, 1);
-      break;
-    }
-  }
-
-  // ... then `position`
-  for (index = 0, total = values.length; index < total; index++) {
-    if (validator.isListStylePositionKeyword(values[index][1])) {
-      position.value = [values[index]];
-      values.splice(index, 1);
-      break;
-    }
-  }
-
-  // ... and what's left is a `type`
-  if (values.length > 0 && (validator.isListStyleTypeKeyword(values[0][1]) || validator.isIdentifier(values[0][1]))) {
-    type.value = [values[0]];
-  }
-
-  return components;
-}
-
-function transition(property, compactable, validator) {
-  var prop = _wrapDefault(property.name + '-property', property, compactable);
-  var duration = _wrapDefault(property.name + '-duration', property, compactable);
-  var timing = _wrapDefault(property.name + '-timing-function', property, compactable);
-  var delay = _wrapDefault(property.name + '-delay', property, compactable);
-  var components = [prop, duration, timing, delay];
-  var values = property.value;
-  var value;
-  var durationSet = false;
-  var delaySet = false;
-  var propSet = false;
-  var timingSet = false;
-  var i;
-  var l;
-
-  if (property.value.length == 1 && property.value[0][1] == 'inherit') {
-    prop.value = duration.value = timing.value = delay.value = property.value;
-    return components;
-  }
-
-  if (values.length > 1 && _anyIsInherit(values)) {
-    throw new InvalidPropertyError('Invalid animation values at ' + formatPosition(values[0][2][0]) + '. Ignoring.');
-  }
-
-  for (i = 0, l = values.length; i < l; i++) {
-    value = values[i];
-
-    if (validator.isTime(value[1]) && !durationSet) {
-      duration.value = [value];
-      durationSet = true;
-    } else if (validator.isTime(value[1]) && !delaySet) {
-      delay.value = [value];
-      delaySet = true;
-    } else if ((validator.isGlobal(value[1]) || validator.isTimingFunction(value[1])) && !timingSet) {
-      timing.value = [value];
-      timingSet = true;
-    } else if (validator.isIdentifier(value[1]) && !propSet) {
-      prop.value = [value];
-      propSet = true;
-    } else {
-      throw new InvalidPropertyError('Invalid animation value at ' + formatPosition(value[2][0]) + '. Ignoring.');
-    }
-  }
-
-  return components;
-}
-
-function widthStyleColor(property, compactable, validator) {
-  var descriptor = compactable[property.name];
-  var components = [
-    _wrapDefault(descriptor.components[0], property, compactable),
-    _wrapDefault(descriptor.components[1], property, compactable),
-    _wrapDefault(descriptor.components[2], property, compactable)
-  ];
-  var color, style, width;
-
-  for (var i = 0; i < 3; i++) {
-    var component = components[i];
-
-    if (component.name.indexOf('color') > 0)
-      color = component;
-    else if (component.name.indexOf('style') > 0)
-      style = component;
-    else
-      width = component;
-  }
-
-  if ((property.value.length == 1 && property.value[0][1] == 'inherit') ||
-      (property.value.length == 3 && property.value[0][1] == 'inherit' && property.value[1][1] == 'inherit' && property.value[2][1] == 'inherit')) {
-    color.value = style.value = width.value = [property.value[0]];
-    return components;
-  }
-
-  var values = property.value.slice(0);
-  var match, matches;
-
-  // NOTE: usually users don't follow the required order of parts in this shorthand,
-  // so we'll try to parse it caring as little about order as possible
-
-  if (values.length > 0) {
-    matches = values.filter(_widthFilter(validator));
-    match = matches.length > 1 && (matches[0][1] == 'none' || matches[0][1] == 'auto') ? matches[1] : matches[0];
-    if (match) {
-      width.value = [match];
-      values.splice(values.indexOf(match), 1);
-    }
-  }
-
-  if (values.length > 0) {
-    match = values.filter(_styleFilter(validator))[0];
-    if (match) {
-      style.value = [match];
-      values.splice(values.indexOf(match), 1);
-    }
-  }
-
-  if (values.length > 0) {
-    match = values.filter(_colorFilter(validator))[0];
-    if (match) {
-      color.value = [match];
-      values.splice(values.indexOf(match), 1);
-    }
-  }
-
-  return components;
-}
-
-module.exports = {
-  animation: animation,
-  background: background,
-  border: widthStyleColor,
-  borderRadius: borderRadius,
-  font: font,
-  fourValues: fourValues,
-  listStyle: listStyle,
-  multiplex: multiplex,
-  outline: widthStyleColor,
-  transition: transition
-};
diff --git a/node_modules/clean-css/lib/optimizer/level-2/can-override.js b/node_modules/clean-css/lib/optimizer/level-2/can-override.js
deleted file mode 100644
index 3dae08f0e..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/can-override.js
+++ /dev/null
@@ -1,283 +0,0 @@
-var understandable = require('./properties/understandable');
-
-function animationIterationCount(validator, value1, value2) {
-  if (!understandable(validator, value1, value2, 0, true) && !(validator.isAnimationIterationCountKeyword(value2) || validator.isPositiveNumber(value2))) {
-    return false;
-  } else if (validator.isVariable(value1) && validator.isVariable(value2)) {
-    return true;
-  }
-
-  return validator.isAnimationIterationCountKeyword(value2) || validator.isPositiveNumber(value2);
-}
-
-function animationName(validator, value1, value2) {
-  if (!understandable(validator, value1, value2, 0, true) && !(validator.isAnimationNameKeyword(value2) || validator.isIdentifier(value2))) {
-    return false;
-  } else if (validator.isVariable(value1) && validator.isVariable(value2)) {
-    return true;
-  }
-
-  return validator.isAnimationNameKeyword(value2) || validator.isIdentifier(value2);
-}
-
-function areSameFunction(validator, value1, value2) {
-  if (!validator.isFunction(value1) || !validator.isFunction(value2)) {
-    return false;
-  }
-
-  var function1Name = value1.substring(0, value1.indexOf('('));
-  var function2Name = value2.substring(0, value2.indexOf('('));
-
-  return function1Name === function2Name;
-}
-
-function backgroundPosition(validator, value1, value2) {
-  if (!understandable(validator, value1, value2, 0, true) && !(validator.isBackgroundPositionKeyword(value2) || validator.isGlobal(value2))) {
-    return false;
-  } else if (validator.isVariable(value1) && validator.isVariable(value2)) {
-    return true;
-  } else if (validator.isBackgroundPositionKeyword(value2) || validator.isGlobal(value2)) {
-    return true;
-  }
-
-  return unit(validator, value1, value2);
-}
-
-function backgroundSize(validator, value1, value2) {
-  if (!understandable(validator, value1, value2, 0, true) && !(validator.isBackgroundSizeKeyword(value2) || validator.isGlobal(value2))) {
-    return false;
-  } else if (validator.isVariable(value1) && validator.isVariable(value2)) {
-    return true;
-  } else if (validator.isBackgroundSizeKeyword(value2) || validator.isGlobal(value2)) {
-    return true;
-  }
-
-  return unit(validator, value1, value2);
-}
-
-function color(validator, value1, value2) {
-  if (!understandable(validator, value1, value2, 0, true) && !validator.isColor(value2)) {
-    return false;
-  } else if (validator.isVariable(value1) && validator.isVariable(value2)) {
-    return true;
-  } else if (!validator.colorOpacity && (validator.isRgbColor(value1) || validator.isHslColor(value1))) {
-    return false;
-  } else if (!validator.colorOpacity && (validator.isRgbColor(value2) || validator.isHslColor(value2))) {
-    return false;
-  } else if (validator.isColor(value1) && validator.isColor(value2)) {
-    return true;
-  }
-
-  return sameFunctionOrValue(validator, value1, value2);
-}
-
-function components(overrideCheckers) {
-  return function (validator, value1, value2, position) {
-    return overrideCheckers[position](validator, value1, value2);
-  };
-}
-
-function fontFamily(validator, value1, value2) {
-  return understandable(validator, value1, value2, 0, true);
-}
-
-function image(validator, value1, value2) {
-  if (!understandable(validator, value1, value2, 0, true) && !validator.isImage(value2)) {
-    return false;
-  } else if (validator.isVariable(value1) && validator.isVariable(value2)) {
-    return true;
-  } else if (validator.isImage(value2)) {
-    return true;
-  } else if (validator.isImage(value1)) {
-    return false;
-  }
-
-  return sameFunctionOrValue(validator, value1, value2);
-}
-
-function keyword(propertyName) {
-  return function(validator, value1, value2) {
-    if (!understandable(validator, value1, value2, 0, true) && !validator.isKeyword(propertyName)(value2)) {
-      return false;
-    } else if (validator.isVariable(value1) && validator.isVariable(value2)) {
-      return true;
-    }
-
-    return validator.isKeyword(propertyName)(value2);
-  };
-}
-
-function keywordWithGlobal(propertyName) {
-  return function(validator, value1, value2) {
-    if (!understandable(validator, value1, value2, 0, true) && !(validator.isKeyword(propertyName)(value2) || validator.isGlobal(value2))) {
-      return false;
-    } else if (validator.isVariable(value1) && validator.isVariable(value2)) {
-      return true;
-    }
-
-    return validator.isKeyword(propertyName)(value2) || validator.isGlobal(value2);
-  };
-}
-
-function propertyName(validator, value1, value2) {
-  if (!understandable(validator, value1, value2, 0, true) && !validator.isIdentifier(value2)) {
-    return false;
-  } else if (validator.isVariable(value1) && validator.isVariable(value2)) {
-    return true;
-  }
-
-  return validator.isIdentifier(value2);
-}
-
-function sameFunctionOrValue(validator, value1, value2) {
-  return areSameFunction(validator, value1, value2) ?
-    true :
-    value1 === value2;
-}
-
-function textShadow(validator, value1, value2) {
-  if (!understandable(validator, value1, value2, 0, true) && !(validator.isUnit(value2) || validator.isColor(value2) || validator.isGlobal(value2))) {
-    return false;
-  } else if (validator.isVariable(value1) && validator.isVariable(value2)) {
-    return true;
-  }
-
-  return validator.isUnit(value2) || validator.isColor(value2) || validator.isGlobal(value2);
-}
-
-function time(validator, value1, value2) {
-  if (!understandable(validator, value1, value2, 0, true) && !validator.isTime(value2)) {
-    return false;
-  } else if (validator.isVariable(value1) && validator.isVariable(value2)) {
-    return true;
-  } else if (validator.isTime(value1) && !validator.isTime(value2)) {
-    return false;
-  } else if (validator.isTime(value2)) {
-    return true;
-  } else if (validator.isTime(value1)) {
-    return false;
-  } else if (validator.isFunction(value1) && !validator.isPrefixed(value1) && validator.isFunction(value2) && !validator.isPrefixed(value2)) {
-    return true;
-  }
-
-  return sameFunctionOrValue(validator, value1, value2);
-}
-
-function timingFunction(validator, value1, value2) {
-  if (!understandable(validator, value1, value2, 0, true) && !(validator.isTimingFunction(value2) || validator.isGlobal(value2))) {
-    return false;
-  } else if (validator.isVariable(value1) && validator.isVariable(value2)) {
-    return true;
-  }
-
-  return validator.isTimingFunction(value2) || validator.isGlobal(value2);
-}
-
-function unit(validator, value1, value2) {
-  if (!understandable(validator, value1, value2, 0, true) && !validator.isUnit(value2)) {
-    return false;
-  } else if (validator.isVariable(value1) && validator.isVariable(value2)) {
-    return true;
-  } else if (validator.isUnit(value1) && !validator.isUnit(value2)) {
-    return false;
-  } else if (validator.isUnit(value2)) {
-    return true;
-  } else if (validator.isUnit(value1)) {
-    return false;
-  } else if (validator.isFunction(value1) && !validator.isPrefixed(value1) && validator.isFunction(value2) && !validator.isPrefixed(value2)) {
-    return true;
-  }
-
-  return sameFunctionOrValue(validator, value1, value2);
-}
-
-function unitOrKeywordWithGlobal(propertyName) {
-  var byKeyword = keywordWithGlobal(propertyName);
-
-  return function(validator, value1, value2) {
-    return unit(validator, value1, value2) || byKeyword(validator, value1, value2);
-  };
-}
-
-function unitOrNumber(validator, value1, value2) {
-  if (!understandable(validator, value1, value2, 0, true) && !(validator.isUnit(value2) || validator.isNumber(value2))) {
-    return false;
-  } else if (validator.isVariable(value1) && validator.isVariable(value2)) {
-    return true;
-  } else if ((validator.isUnit(value1) || validator.isNumber(value1)) && !(validator.isUnit(value2) || validator.isNumber(value2))) {
-    return false;
-  } else if (validator.isUnit(value2) || validator.isNumber(value2)) {
-    return true;
-  } else if (validator.isUnit(value1) || validator.isNumber(value1)) {
-    return false;
-  } else if (validator.isFunction(value1) && !validator.isPrefixed(value1) && validator.isFunction(value2) && !validator.isPrefixed(value2)) {
-    return true;
-  }
-
-  return sameFunctionOrValue(validator, value1, value2);
-}
-
-function zIndex(validator, value1, value2) {
-  if (!understandable(validator, value1, value2, 0, true) && !validator.isZIndex(value2)) {
-    return false;
-  } else if (validator.isVariable(value1) && validator.isVariable(value2)) {
-    return true;
-  }
-
-  return validator.isZIndex(value2);
-}
-
-module.exports = {
-  generic: {
-    color: color,
-    components: components,
-    image: image,
-    propertyName: propertyName,
-    time: time,
-    timingFunction: timingFunction,
-    unit: unit,
-    unitOrNumber: unitOrNumber
-  },
-  property: {
-    animationDirection: keywordWithGlobal('animation-direction'),
-    animationFillMode: keyword('animation-fill-mode'),
-    animationIterationCount: animationIterationCount,
-    animationName: animationName,
-    animationPlayState: keywordWithGlobal('animation-play-state'),
-    backgroundAttachment: keyword('background-attachment'),
-    backgroundClip: keywordWithGlobal('background-clip'),
-    backgroundOrigin: keyword('background-origin'),
-    backgroundPosition: backgroundPosition,
-    backgroundRepeat: keyword('background-repeat'),
-    backgroundSize: backgroundSize,
-    bottom: unitOrKeywordWithGlobal('bottom'),
-    borderCollapse: keyword('border-collapse'),
-    borderStyle: keywordWithGlobal('*-style'),
-    clear: keywordWithGlobal('clear'),
-    cursor: keywordWithGlobal('cursor'),
-    display: keywordWithGlobal('display'),
-    float: keywordWithGlobal('float'),
-    left: unitOrKeywordWithGlobal('left'),
-    fontFamily: fontFamily,
-    fontStretch: keywordWithGlobal('font-stretch'),
-    fontStyle: keywordWithGlobal('font-style'),
-    fontVariant: keywordWithGlobal('font-variant'),
-    fontWeight: keywordWithGlobal('font-weight'),
-    listStyleType: keywordWithGlobal('list-style-type'),
-    listStylePosition: keywordWithGlobal('list-style-position'),
-    outlineStyle: keywordWithGlobal('*-style'),
-    overflow: keywordWithGlobal('overflow'),
-    position: keywordWithGlobal('position'),
-    right: unitOrKeywordWithGlobal('right'),
-    textAlign: keywordWithGlobal('text-align'),
-    textDecoration: keywordWithGlobal('text-decoration'),
-    textOverflow: keywordWithGlobal('text-overflow'),
-    textShadow: textShadow,
-    top: unitOrKeywordWithGlobal('top'),
-    transform: sameFunctionOrValue,
-    verticalAlign: unitOrKeywordWithGlobal('vertical-align'),
-    visibility: keywordWithGlobal('visibility'),
-    whiteSpace: keywordWithGlobal('white-space'),
-    zIndex: zIndex
-  }
-};
diff --git a/node_modules/clean-css/lib/optimizer/level-2/clone.js b/node_modules/clean-css/lib/optimizer/level-2/clone.js
deleted file mode 100644
index 3830095e9..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/clone.js
+++ /dev/null
@@ -1,33 +0,0 @@
-var wrapSingle = require('../wrap-for-optimizing').single;
-
-var Token = require('../../tokenizer/token');
-
-function deep(property) {
-  var cloned = shallow(property);
-  for (var i = property.components.length - 1; i >= 0; i--) {
-    var component = shallow(property.components[i]);
-    component.value = property.components[i].value.slice(0);
-    cloned.components.unshift(component);
-  }
-
-  cloned.dirty = true;
-  cloned.value = property.value.slice(0);
-
-  return cloned;
-}
-
-function shallow(property) {
-  var cloned = wrapSingle([
-    Token.PROPERTY,
-    [Token.PROPERTY_NAME, property.name]
-  ]);
-  cloned.important = property.important;
-  cloned.hack = property.hack;
-  cloned.unused = false;
-  return cloned;
-}
-
-module.exports = {
-  deep: deep,
-  shallow: shallow
-};
diff --git a/node_modules/clean-css/lib/optimizer/level-2/compactable.js b/node_modules/clean-css/lib/optimizer/level-2/compactable.js
deleted file mode 100644
index 73f42a10e..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/compactable.js
+++ /dev/null
@@ -1,1063 +0,0 @@
-// Contains the interpretation of CSS properties, as used by the property optimizer
-
-var breakUp = require('./break-up');
-var canOverride = require('./can-override');
-var restore = require('./restore');
-
-var override = require('../../utils/override');
-
-// Properties to process
-// Extend this object in order to add support for more properties in the optimizer.
-//
-// Each key in this object represents a CSS property and should be an object.
-// Such an object contains properties that describe how the represented CSS property should be handled.
-// Possible options:
-//
-// * components: array (Only specify for shorthand properties.)
-//   Contains the names of the granular properties this shorthand compacts.
-//
-// * canOverride: function
-//   Returns whether two tokens of this property can be merged with each other.
-//   This property has no meaning for shorthands.
-//
-// * defaultValue: string
-//   Specifies the default value of the property according to the CSS standard.
-//   For shorthand, this is used when every component is set to its default value, therefore it should be the shortest possible default value of all the components.
-//
-// * shortestValue: string
-//   Specifies the shortest possible value the property can possibly have.
-//   (Falls back to defaultValue if unspecified.)
-//
-// * breakUp: function (Only specify for shorthand properties.)
-//   Breaks the shorthand up to its components.
-//
-// * restore: function (Only specify for shorthand properties.)
-//   Puts the shorthand together from its components.
-//
-var compactable = {
-  'animation': {
-    canOverride: canOverride.generic.components([
-      canOverride.generic.time,
-      canOverride.generic.timingFunction,
-      canOverride.generic.time,
-      canOverride.property.animationIterationCount,
-      canOverride.property.animationDirection,
-      canOverride.property.animationFillMode,
-      canOverride.property.animationPlayState,
-      canOverride.property.animationName
-    ]),
-    components: [
-      'animation-duration',
-      'animation-timing-function',
-      'animation-delay',
-      'animation-iteration-count',
-      'animation-direction',
-      'animation-fill-mode',
-      'animation-play-state',
-      'animation-name'
-    ],
-    breakUp: breakUp.multiplex(breakUp.animation),
-    defaultValue: 'none',
-    restore: restore.multiplex(restore.withoutDefaults),
-    shorthand: true,
-    vendorPrefixes: [
-      '-moz-',
-      '-o-',
-      '-webkit-'
-    ]
-  },
-  'animation-delay': {
-    canOverride: canOverride.generic.time,
-    componentOf: [
-      'animation'
-    ],
-    defaultValue: '0s',
-    intoMultiplexMode: 'real',
-    vendorPrefixes: [
-      '-moz-',
-      '-o-',
-      '-webkit-'
-    ]
-  },
-  'animation-direction': {
-    canOverride: canOverride.property.animationDirection,
-    componentOf: [
-      'animation'
-    ],
-    defaultValue: 'normal',
-    intoMultiplexMode: 'real',
-    vendorPrefixes: [
-      '-moz-',
-      '-o-',
-      '-webkit-'
-    ]
-  },
-  'animation-duration': {
-    canOverride: canOverride.generic.time,
-    componentOf: [
-      'animation'
-    ],
-    defaultValue: '0s',
-    intoMultiplexMode: 'real',
-    keepUnlessDefault: 'animation-delay',
-    vendorPrefixes: [
-      '-moz-',
-      '-o-',
-      '-webkit-'
-    ]
-  },
-  'animation-fill-mode': {
-    canOverride: canOverride.property.animationFillMode,
-    componentOf: [
-      'animation'
-    ],
-    defaultValue: 'none',
-    intoMultiplexMode: 'real',
-    vendorPrefixes: [
-      '-moz-',
-      '-o-',
-      '-webkit-'
-    ]
-  },
-  'animation-iteration-count': {
-    canOverride: canOverride.property.animationIterationCount,
-    componentOf: [
-      'animation'
-    ],
-    defaultValue: '1',
-    intoMultiplexMode: 'real',
-    vendorPrefixes: [
-      '-moz-',
-      '-o-',
-      '-webkit-'
-    ]
-  },
-  'animation-name': {
-    canOverride: canOverride.property.animationName,
-    componentOf: [
-      'animation'
-    ],
-    defaultValue: 'none',
-    intoMultiplexMode: 'real',
-    vendorPrefixes: [
-      '-moz-',
-      '-o-',
-      '-webkit-'
-    ]
-  },
-  'animation-play-state': {
-    canOverride: canOverride.property.animationPlayState,
-    componentOf: [
-      'animation'
-    ],
-    defaultValue: 'running',
-    intoMultiplexMode: 'real',
-    vendorPrefixes: [
-      '-moz-',
-      '-o-',
-      '-webkit-'
-    ]
-  },
-  'animation-timing-function': {
-    canOverride: canOverride.generic.timingFunction,
-    componentOf: [
-      'animation'
-    ],
-    defaultValue: 'ease',
-    intoMultiplexMode: 'real',
-    vendorPrefixes: [
-      '-moz-',
-      '-o-',
-      '-webkit-'
-    ]
-  },
-  'background': {
-    canOverride: canOverride.generic.components([
-      canOverride.generic.image,
-      canOverride.property.backgroundPosition,
-      canOverride.property.backgroundSize,
-      canOverride.property.backgroundRepeat,
-      canOverride.property.backgroundAttachment,
-      canOverride.property.backgroundOrigin,
-      canOverride.property.backgroundClip,
-      canOverride.generic.color
-    ]),
-    components: [
-      'background-image',
-      'background-position',
-      'background-size',
-      'background-repeat',
-      'background-attachment',
-      'background-origin',
-      'background-clip',
-      'background-color'
-    ],
-    breakUp: breakUp.multiplex(breakUp.background),
-    defaultValue: '0 0',
-    restore: restore.multiplex(restore.background),
-    shortestValue: '0',
-    shorthand: true
-  },
-  'background-attachment': {
-    canOverride: canOverride.property.backgroundAttachment,
-    componentOf: [
-      'background'
-    ],
-    defaultValue: 'scroll',
-    intoMultiplexMode: 'real'
-  },
-  'background-clip': {
-    canOverride: canOverride.property.backgroundClip,
-    componentOf: [
-      'background'
-    ],
-    defaultValue: 'border-box',
-    intoMultiplexMode: 'real',
-    shortestValue: 'border-box'
-  },
-  'background-color': {
-    canOverride: canOverride.generic.color,
-    componentOf: [
-      'background'
-    ],
-    defaultValue: 'transparent',
-    intoMultiplexMode: 'real', // otherwise real color will turn into default since color appears in last multiplex only
-    multiplexLastOnly: true,
-    nonMergeableValue: 'none',
-    shortestValue: 'red'
-  },
-  'background-image': {
-    canOverride: canOverride.generic.image,
-    componentOf: [
-      'background'
-    ],
-    defaultValue: 'none',
-    intoMultiplexMode: 'default'
-  },
-  'background-origin': {
-    canOverride: canOverride.property.backgroundOrigin,
-    componentOf: [
-      'background'
-    ],
-    defaultValue: 'padding-box',
-    intoMultiplexMode: 'real',
-    shortestValue: 'border-box'
-  },
-  'background-position': {
-    canOverride: canOverride.property.backgroundPosition,
-    componentOf: [
-      'background'
-    ],
-    defaultValue: ['0', '0'],
-    doubleValues: true,
-    intoMultiplexMode: 'real',
-    shortestValue: '0'
-  },
-  'background-repeat': {
-    canOverride: canOverride.property.backgroundRepeat,
-    componentOf: [
-      'background'
-    ],
-    defaultValue: ['repeat'],
-    doubleValues: true,
-    intoMultiplexMode: 'real'
-  },
-  'background-size': {
-    canOverride: canOverride.property.backgroundSize,
-    componentOf: [
-      'background'
-    ],
-    defaultValue: ['auto'],
-    doubleValues: true,
-    intoMultiplexMode: 'real',
-    shortestValue: '0 0'
-  },
-  'bottom': {
-    canOverride: canOverride.property.bottom,
-    defaultValue: 'auto'
-  },
-  'border': {
-    breakUp: breakUp.border,
-    canOverride: canOverride.generic.components([
-      canOverride.generic.unit,
-      canOverride.property.borderStyle,
-      canOverride.generic.color
-    ]),
-    components: [
-      'border-width',
-      'border-style',
-      'border-color'
-    ],
-    defaultValue: 'none',
-    overridesShorthands: [
-      'border-bottom',
-      'border-left',
-      'border-right',
-      'border-top'
-    ],
-    restore: restore.withoutDefaults,
-    shorthand: true,
-    shorthandComponents: true
-  },
-  'border-bottom': {
-    breakUp: breakUp.border,
-    canOverride: canOverride.generic.components([
-      canOverride.generic.unit,
-      canOverride.property.borderStyle,
-      canOverride.generic.color
-    ]),
-    components: [
-      'border-bottom-width',
-      'border-bottom-style',
-      'border-bottom-color'
-    ],
-    defaultValue: 'none',
-    restore: restore.withoutDefaults,
-    shorthand: true
-  },
-  'border-bottom-color': {
-    canOverride: canOverride.generic.color,
-    componentOf: [
-      'border-bottom',
-      'border-color'
-    ],
-    defaultValue: 'none'
-  },
-  'border-bottom-left-radius': {
-    canOverride: canOverride.generic.unit,
-    componentOf: [
-      'border-radius'
-    ],
-    defaultValue: '0',
-    vendorPrefixes: [
-      '-moz-',
-      '-o-'
-    ]
-  },
-  'border-bottom-right-radius': {
-    canOverride: canOverride.generic.unit,
-    componentOf: [
-      'border-radius'
-    ],
-    defaultValue: '0',
-    vendorPrefixes: [
-      '-moz-',
-      '-o-'
-    ]
-  },
-  'border-bottom-style': {
-    canOverride: canOverride.property.borderStyle,
-    componentOf: [
-      'border-bottom',
-      'border-style'
-    ],
-    defaultValue: 'none'
-  },
-  'border-bottom-width': {
-    canOverride: canOverride.generic.unit,
-    componentOf: [
-      'border-bottom',
-      'border-width'
-    ],
-    defaultValue: 'medium',
-    oppositeTo: 'border-top-width',
-    shortestValue: '0'
-  },
-  'border-collapse': {
-    canOverride: canOverride.property.borderCollapse,
-    defaultValue: 'separate'
-  },
-  'border-color': {
-    breakUp: breakUp.fourValues,
-    canOverride: canOverride.generic.components([
-      canOverride.generic.color,
-      canOverride.generic.color,
-      canOverride.generic.color,
-      canOverride.generic.color
-    ]),
-    componentOf: [
-      'border'
-    ],
-    components: [
-      'border-top-color',
-      'border-right-color',
-      'border-bottom-color',
-      'border-left-color'
-    ],
-    defaultValue: 'none',
-    restore: restore.fourValues,
-    shortestValue: 'red',
-    shorthand: true
-  },
-  'border-left': {
-    breakUp: breakUp.border,
-    canOverride: canOverride.generic.components([
-      canOverride.generic.unit,
-      canOverride.property.borderStyle,
-      canOverride.generic.color
-    ]),
-    components: [
-      'border-left-width',
-      'border-left-style',
-      'border-left-color'
-    ],
-    defaultValue: 'none',
-    restore: restore.withoutDefaults,
-    shorthand: true
-  },
-  'border-left-color': {
-    canOverride: canOverride.generic.color,
-    componentOf: [
-      'border-color',
-      'border-left'
-    ],
-    defaultValue: 'none'
-  },
-  'border-left-style': {
-    canOverride: canOverride.property.borderStyle,
-    componentOf: [
-      'border-left',
-      'border-style'
-    ],
-    defaultValue: 'none'
-  },
-  'border-left-width': {
-    canOverride: canOverride.generic.unit,
-    componentOf: [
-      'border-left',
-      'border-width'
-    ],
-    defaultValue: 'medium',
-    oppositeTo: 'border-right-width',
-    shortestValue: '0'
-  },
-  'border-radius': {
-    breakUp: breakUp.borderRadius,
-    canOverride: canOverride.generic.components([
-      canOverride.generic.unit,
-      canOverride.generic.unit,
-      canOverride.generic.unit,
-      canOverride.generic.unit
-    ]),
-    components: [
-      'border-top-left-radius',
-      'border-top-right-radius',
-      'border-bottom-right-radius',
-      'border-bottom-left-radius'
-    ],
-    defaultValue: '0',
-    restore: restore.borderRadius,
-    shorthand: true,
-    vendorPrefixes: [
-      '-moz-',
-      '-o-'
-    ]
-  },
-  'border-right': {
-    breakUp: breakUp.border,
-    canOverride: canOverride.generic.components([
-      canOverride.generic.unit,
-      canOverride.property.borderStyle,
-      canOverride.generic.color
-    ]),
-    components: [
-      'border-right-width',
-      'border-right-style',
-      'border-right-color'
-    ],
-    defaultValue: 'none',
-    restore: restore.withoutDefaults,
-    shorthand: true
-  },
-  'border-right-color': {
-    canOverride: canOverride.generic.color,
-    componentOf: [
-      'border-color',
-      'border-right'
-    ],
-    defaultValue: 'none'
-  },
-  'border-right-style': {
-    canOverride: canOverride.property.borderStyle,
-    componentOf: [
-      'border-right',
-      'border-style'
-    ],
-    defaultValue: 'none'
-  },
-  'border-right-width': {
-    canOverride: canOverride.generic.unit,
-    componentOf: [
-      'border-right',
-      'border-width'
-    ],
-    defaultValue: 'medium',
-    oppositeTo: 'border-left-width',
-    shortestValue: '0'
-  },
-  'border-style': {
-    breakUp: breakUp.fourValues,
-    canOverride: canOverride.generic.components([
-      canOverride.property.borderStyle,
-      canOverride.property.borderStyle,
-      canOverride.property.borderStyle,
-      canOverride.property.borderStyle
-    ]),
-    componentOf: [
-      'border'
-    ],
-    components: [
-      'border-top-style',
-      'border-right-style',
-      'border-bottom-style',
-      'border-left-style'
-    ],
-    defaultValue: 'none',
-    restore: restore.fourValues,
-    shorthand: true
-  },
-  'border-top': {
-    breakUp: breakUp.border,
-    canOverride: canOverride.generic.components([
-      canOverride.generic.unit,
-      canOverride.property.borderStyle,
-      canOverride.generic.color
-    ]),
-    components: [
-      'border-top-width',
-      'border-top-style',
-      'border-top-color'
-    ],
-    defaultValue: 'none',
-    restore: restore.withoutDefaults,
-    shorthand: true
-  },
-  'border-top-color': {
-    canOverride: canOverride.generic.color,
-    componentOf: [
-      'border-color',
-      'border-top'
-    ],
-    defaultValue: 'none'
-  },
-  'border-top-left-radius': {
-    canOverride: canOverride.generic.unit,
-    componentOf: [
-      'border-radius'
-    ],
-    defaultValue: '0',
-    vendorPrefixes: [
-      '-moz-',
-      '-o-'
-    ]
-  },
-  'border-top-right-radius': {
-    canOverride: canOverride.generic.unit,
-    componentOf: [
-      'border-radius'
-    ],
-    defaultValue: '0',
-    vendorPrefixes: [
-      '-moz-',
-      '-o-'
-    ]
-  },
-  'border-top-style': {
-    canOverride: canOverride.property.borderStyle,
-    componentOf: [
-      'border-style',
-      'border-top'
-    ],
-    defaultValue: 'none'
-  },
-  'border-top-width': {
-    canOverride: canOverride.generic.unit,
-    componentOf: [
-      'border-top',
-      'border-width'
-    ],
-    defaultValue: 'medium',
-    oppositeTo: 'border-bottom-width',
-    shortestValue: '0'
-  },
-  'border-width': {
-    breakUp: breakUp.fourValues,
-    canOverride: canOverride.generic.components([
-      canOverride.generic.unit,
-      canOverride.generic.unit,
-      canOverride.generic.unit,
-      canOverride.generic.unit
-    ]),
-    componentOf: [
-      'border'
-    ],
-    components: [
-      'border-top-width',
-      'border-right-width',
-      'border-bottom-width',
-      'border-left-width'
-    ],
-    defaultValue: 'medium',
-    restore: restore.fourValues,
-    shortestValue: '0',
-    shorthand: true
-  },
-  'clear': {
-    canOverride: canOverride.property.clear,
-    defaultValue: 'none'
-  },
-  'color': {
-    canOverride: canOverride.generic.color,
-    defaultValue: 'transparent',
-    shortestValue: 'red'
-  },
-  'cursor': {
-    canOverride: canOverride.property.cursor,
-    defaultValue: 'auto'
-  },
-  'display': {
-    canOverride: canOverride.property.display,
-  },
-  'float': {
-    canOverride: canOverride.property.float,
-    defaultValue: 'none'
-  },
-  'font': {
-    breakUp: breakUp.font,
-    canOverride: canOverride.generic.components([
-      canOverride.property.fontStyle,
-      canOverride.property.fontVariant,
-      canOverride.property.fontWeight,
-      canOverride.property.fontStretch,
-      canOverride.generic.unit,
-      canOverride.generic.unit,
-      canOverride.property.fontFamily
-    ]),
-    components: [
-      'font-style',
-      'font-variant',
-      'font-weight',
-      'font-stretch',
-      'font-size',
-      'line-height',
-      'font-family'
-    ],
-    restore: restore.font,
-    shorthand: true
-  },
-  'font-family': {
-    canOverride: canOverride.property.fontFamily,
-    defaultValue: 'user|agent|specific'
-  },
-  'font-size': {
-    canOverride: canOverride.generic.unit,
-    defaultValue: 'medium',
-    shortestValue: '0'
-  },
-  'font-stretch': {
-    canOverride: canOverride.property.fontStretch,
-    defaultValue: 'normal'
-  },
-  'font-style': {
-    canOverride: canOverride.property.fontStyle,
-    defaultValue: 'normal'
-  },
-  'font-variant': {
-    canOverride: canOverride.property.fontVariant,
-    defaultValue: 'normal'
-  },
-  'font-weight': {
-    canOverride: canOverride.property.fontWeight,
-    defaultValue: 'normal',
-    shortestValue: '400'
-  },
-  'height': {
-    canOverride: canOverride.generic.unit,
-    defaultValue: 'auto',
-    shortestValue: '0'
-  },
-  'left': {
-    canOverride: canOverride.property.left,
-    defaultValue: 'auto'
-  },
-  'line-height': {
-    canOverride: canOverride.generic.unitOrNumber,
-    defaultValue: 'normal',
-    shortestValue: '0'
-  },
-  'list-style': {
-    canOverride: canOverride.generic.components([
-      canOverride.property.listStyleType,
-      canOverride.property.listStylePosition,
-      canOverride.property.listStyleImage
-    ]),
-    components: [
-      'list-style-type',
-      'list-style-position',
-      'list-style-image'
-    ],
-    breakUp: breakUp.listStyle,
-    restore: restore.withoutDefaults,
-    defaultValue: 'outside', // can't use 'disc' because that'd override default 'decimal' for <ol>
-    shortestValue: 'none',
-    shorthand: true
-  },
-  'list-style-image' : {
-    canOverride: canOverride.generic.image,
-    componentOf: [
-      'list-style'
-    ],
-    defaultValue: 'none'
-  },
-  'list-style-position' : {
-    canOverride: canOverride.property.listStylePosition,
-    componentOf: [
-      'list-style'
-    ],
-    defaultValue: 'outside',
-    shortestValue: 'inside'
-  },
-  'list-style-type' : {
-    canOverride: canOverride.property.listStyleType,
-    componentOf: [
-      'list-style'
-    ],
-    // NOTE: we can't tell the real default value here, it's 'disc' for <ul> and 'decimal' for <ol>
-    // this is a hack, but it doesn't matter because this value will be either overridden or
-    // it will disappear at the final step anyway
-    defaultValue: 'decimal|disc',
-    shortestValue: 'none'
-  },
-  'margin': {
-    breakUp: breakUp.fourValues,
-    canOverride: canOverride.generic.components([
-      canOverride.generic.unit,
-      canOverride.generic.unit,
-      canOverride.generic.unit,
-      canOverride.generic.unit
-    ]),
-    components: [
-      'margin-top',
-      'margin-right',
-      'margin-bottom',
-      'margin-left'
-    ],
-    defaultValue: '0',
-    restore: restore.fourValues,
-    shorthand: true
-  },
-  'margin-bottom': {
-    canOverride: canOverride.generic.unit,
-    componentOf: [
-      'margin'
-    ],
-    defaultValue: '0',
-    oppositeTo: 'margin-top'
-  },
-  'margin-left': {
-    canOverride: canOverride.generic.unit,
-    componentOf: [
-      'margin'
-    ],
-    defaultValue: '0',
-    oppositeTo: 'margin-right'
-  },
-  'margin-right': {
-    canOverride: canOverride.generic.unit,
-    componentOf: [
-      'margin'
-    ],
-    defaultValue: '0',
-    oppositeTo: 'margin-left'
-  },
-  'margin-top': {
-    canOverride: canOverride.generic.unit,
-    componentOf: [
-      'margin'
-    ],
-    defaultValue: '0',
-    oppositeTo: 'margin-bottom'
-  },
-  'outline': {
-    canOverride: canOverride.generic.components([
-      canOverride.generic.color,
-      canOverride.property.outlineStyle,
-      canOverride.generic.unit
-    ]),
-    components: [
-      'outline-color',
-      'outline-style',
-      'outline-width'
-    ],
-    breakUp: breakUp.outline,
-    restore: restore.withoutDefaults,
-    defaultValue: '0',
-    shorthand: true
-  },
-  'outline-color': {
-    canOverride: canOverride.generic.color,
-    componentOf: [
-      'outline'
-    ],
-    defaultValue: 'invert',
-    shortestValue: 'red'
-  },
-  'outline-style': {
-    canOverride: canOverride.property.outlineStyle,
-    componentOf: [
-      'outline'
-    ],
-    defaultValue: 'none'
-  },
-  'outline-width': {
-    canOverride: canOverride.generic.unit,
-    componentOf: [
-      'outline'
-    ],
-    defaultValue: 'medium',
-    shortestValue: '0'
-  },
-  'overflow': {
-    canOverride: canOverride.property.overflow,
-    defaultValue: 'visible'
-  },
-  'overflow-x': {
-    canOverride: canOverride.property.overflow,
-    defaultValue: 'visible'
-  },
-  'overflow-y': {
-    canOverride: canOverride.property.overflow,
-    defaultValue: 'visible'
-  },
-  'padding': {
-    breakUp: breakUp.fourValues,
-    canOverride: canOverride.generic.components([
-      canOverride.generic.unit,
-      canOverride.generic.unit,
-      canOverride.generic.unit,
-      canOverride.generic.unit
-    ]),
-    components: [
-      'padding-top',
-      'padding-right',
-      'padding-bottom',
-      'padding-left'
-    ],
-    defaultValue: '0',
-    restore: restore.fourValues,
-    shorthand: true
-  },
-  'padding-bottom': {
-    canOverride: canOverride.generic.unit,
-    componentOf: [
-      'padding'
-    ],
-    defaultValue: '0',
-    oppositeTo: 'padding-top'
-  },
-  'padding-left': {
-    canOverride: canOverride.generic.unit,
-    componentOf: [
-      'padding'
-    ],
-    defaultValue: '0',
-    oppositeTo: 'padding-right'
-  },
-  'padding-right': {
-    canOverride: canOverride.generic.unit,
-    componentOf: [
-      'padding'
-    ],
-    defaultValue: '0',
-    oppositeTo: 'padding-left'
-  },
-  'padding-top': {
-    canOverride: canOverride.generic.unit,
-    componentOf: [
-      'padding'
-    ],
-    defaultValue: '0',
-    oppositeTo: 'padding-bottom'
-  },
-  'position': {
-    canOverride: canOverride.property.position,
-    defaultValue: 'static'
-  },
-  'right': {
-    canOverride: canOverride.property.right,
-    defaultValue: 'auto'
-  },
-  'text-align': {
-    canOverride: canOverride.property.textAlign,
-    // NOTE: we can't tell the real default value here, as it depends on default text direction
-    // this is a hack, but it doesn't matter because this value will be either overridden or
-    // it will disappear anyway
-    defaultValue: 'left|right'
-  },
-  'text-decoration': {
-    canOverride: canOverride.property.textDecoration,
-    defaultValue: 'none'
-  },
-  'text-overflow': {
-    canOverride: canOverride.property.textOverflow,
-    defaultValue: 'none'
-  },
-  'text-shadow': {
-    canOverride: canOverride.property.textShadow,
-    defaultValue: 'none'
-  },
-  'top': {
-    canOverride: canOverride.property.top,
-    defaultValue: 'auto'
-  },
-  'transform': {
-    canOverride: canOverride.property.transform,
-    vendorPrefixes: [
-      '-moz-',
-      '-ms-',
-      '-webkit-'
-    ]
-  },
-  'transition': {
-    breakUp: breakUp.multiplex(breakUp.transition),
-    canOverride: canOverride.generic.components([
-      canOverride.property.transitionProperty,
-      canOverride.generic.time,
-      canOverride.generic.timingFunction,
-      canOverride.generic.time
-    ]),
-    components: [
-      'transition-property',
-      'transition-duration',
-      'transition-timing-function',
-      'transition-delay'
-    ],
-    defaultValue: 'none',
-    restore: restore.multiplex(restore.withoutDefaults),
-    shorthand: true,
-    vendorPrefixes: [
-      '-moz-',
-      '-o-',
-      '-webkit-'
-    ]
-  },
-  'transition-delay': {
-    canOverride: canOverride.generic.time,
-    componentOf: [
-      'transition'
-    ],
-    defaultValue: '0s',
-    intoMultiplexMode: 'real',
-    vendorPrefixes: [
-      '-moz-',
-      '-o-',
-      '-webkit-'
-    ]
-  },
-  'transition-duration': {
-    canOverride: canOverride.generic.time,
-    componentOf: [
-      'transition'
-    ],
-    defaultValue: '0s',
-    intoMultiplexMode: 'real',
-    vendorPrefixes: [
-      '-moz-',
-      '-o-',
-      '-webkit-'
-    ]
-  },
-  'transition-property': {
-    canOverride: canOverride.generic.propertyName,
-    componentOf: [
-      'transition'
-    ],
-    defaultValue: 'all',
-    intoMultiplexMode: 'placeholder',
-    placeholderValue: '_', // it's a short value that won't match any property and still be a valid `transition-property`
-    vendorPrefixes: [
-      '-moz-',
-      '-o-',
-      '-webkit-'
-    ]
-  },
-  'transition-timing-function': {
-    canOverride: canOverride.generic.timingFunction,
-    componentOf: [
-      'transition'
-    ],
-    defaultValue: 'ease',
-    intoMultiplexMode: 'real',
-    vendorPrefixes: [
-      '-moz-',
-      '-o-',
-      '-webkit-'
-    ]
-  },
-  'vertical-align': {
-    canOverride: canOverride.property.verticalAlign,
-    defaultValue: 'baseline'
-  },
-  'visibility': {
-    canOverride: canOverride.property.visibility,
-    defaultValue: 'visible'
-  },
-  'white-space': {
-    canOverride: canOverride.property.whiteSpace,
-    defaultValue: 'normal'
-  },
-  'width': {
-    canOverride: canOverride.generic.unit,
-    defaultValue: 'auto',
-    shortestValue: '0'
-  },
-  'z-index': {
-    canOverride: canOverride.property.zIndex,
-    defaultValue: 'auto'
-  }
-};
-
-function cloneDescriptor(propertyName, prefix) {
-  var clonedDescriptor = override(compactable[propertyName], {});
-
-  if ('componentOf' in clonedDescriptor) {
-    clonedDescriptor.componentOf = clonedDescriptor.componentOf.map(function (shorthandName) {
-      return prefix + shorthandName;
-    });
-  }
-
-  if ('components' in clonedDescriptor) {
-    clonedDescriptor.components = clonedDescriptor.components.map(function (longhandName) {
-      return prefix + longhandName;
-    });
-  }
-
-  if ('keepUnlessDefault' in clonedDescriptor) {
-    clonedDescriptor.keepUnlessDefault = prefix + clonedDescriptor.keepUnlessDefault;
-  }
-
-  return clonedDescriptor;
-}
-
-// generate vendor-prefixed properties
-var vendorPrefixedCompactable = {};
-
-for (var propertyName in compactable) {
-  var descriptor = compactable[propertyName];
-
-  if (!('vendorPrefixes' in descriptor)) {
-    continue;
-  }
-
-  for (var i = 0; i < descriptor.vendorPrefixes.length; i++) {
-    var prefix = descriptor.vendorPrefixes[i];
-    var clonedDescriptor = cloneDescriptor(propertyName, prefix);
-    delete clonedDescriptor.vendorPrefixes;
-
-    vendorPrefixedCompactable[prefix + propertyName] = clonedDescriptor;
-  }
-
-  delete descriptor.vendorPrefixes;
-}
-
-module.exports = override(compactable, vendorPrefixedCompactable);
diff --git a/node_modules/clean-css/lib/optimizer/level-2/extract-properties.js b/node_modules/clean-css/lib/optimizer/level-2/extract-properties.js
deleted file mode 100644
index 8b9b1c2e0..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/extract-properties.js
+++ /dev/null
@@ -1,73 +0,0 @@
-// This extractor is used in level 2 optimizations
-// IMPORTANT: Mind Token class and this code is not related!
-// Properties will be tokenized in one step, see #429
-
-var Token = require('../../tokenizer/token');
-var serializeRules = require('../../writer/one-time').rules;
-var serializeValue = require('../../writer/one-time').value;
-
-function extractProperties(token) {
-  var properties = [];
-  var inSpecificSelector;
-  var property;
-  var name;
-  var value;
-  var i, l;
-
-  if (token[0] == Token.RULE) {
-    inSpecificSelector = !/[\.\+>~]/.test(serializeRules(token[1]));
-
-    for (i = 0, l = token[2].length; i < l; i++) {
-      property = token[2][i];
-
-      if (property[0] != Token.PROPERTY)
-        continue;
-
-      name = property[1][1];
-      if (name.length === 0)
-        continue;
-
-      if (name.indexOf('--') === 0)
-        continue;
-
-      value = serializeValue(property, i);
-
-      properties.push([
-        name,
-        value,
-        findNameRoot(name),
-        token[2][i],
-        name + ':' + value,
-        token[1],
-        inSpecificSelector
-      ]);
-    }
-  } else if (token[0] == Token.NESTED_BLOCK) {
-    for (i = 0, l = token[2].length; i < l; i++) {
-      properties = properties.concat(extractProperties(token[2][i]));
-    }
-  }
-
-  return properties;
-}
-
-function findNameRoot(name) {
-  if (name == 'list-style')
-    return name;
-  if (name.indexOf('-radius') > 0)
-    return 'border-radius';
-  if (name == 'border-collapse' || name == 'border-spacing' || name == 'border-image')
-    return name;
-  if (name.indexOf('border-') === 0 && /^border\-\w+\-\w+$/.test(name))
-    return name.match(/border\-\w+/)[0];
-  if (name.indexOf('border-') === 0 && /^border\-\w+$/.test(name))
-    return 'border';
-  if (name.indexOf('text-') === 0)
-    return name;
-  if (name == '-chrome-')
-    return name;
-
-  return name.replace(/^\-\w+\-/, '').match(/([a-zA-Z]+)/)[0].toLowerCase();
-}
-
-module.exports = extractProperties;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/invalid-property-error.js b/node_modules/clean-css/lib/optimizer/level-2/invalid-property-error.js
deleted file mode 100644
index 86d5b5f9b..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/invalid-property-error.js
+++ /dev/null
@@ -1,10 +0,0 @@
-function InvalidPropertyError(message) {
-  this.name = 'InvalidPropertyError';
-  this.message = message;
-  this.stack = (new Error()).stack;
-}
-
-InvalidPropertyError.prototype = Object.create(Error.prototype);
-InvalidPropertyError.prototype.constructor = InvalidPropertyError;
-
-module.exports = InvalidPropertyError;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/is-mergeable.js b/node_modules/clean-css/lib/optimizer/level-2/is-mergeable.js
deleted file mode 100644
index 29049302a..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/is-mergeable.js
+++ /dev/null
@@ -1,259 +0,0 @@
-var Marker = require('../../tokenizer/marker');
-var split = require('../../utils/split');
-
-var DEEP_SELECTOR_PATTERN = /\/deep\//;
-var DOUBLE_COLON_PATTERN = /^::/;
-var NOT_PSEUDO = ':not';
-var PSEUDO_CLASSES_WITH_ARGUMENTS = [
-  ':dir',
-  ':lang',
-  ':not',
-  ':nth-child',
-  ':nth-last-child',
-  ':nth-last-of-type',
-  ':nth-of-type'
-];
-var RELATION_PATTERN = /[>\+~]/;
-var UNMIXABLE_PSEUDO_CLASSES = [
-  ':after',
-  ':before',
-  ':first-letter',
-  ':first-line',
-  ':lang'
-];
-var UNMIXABLE_PSEUDO_ELEMENTS = [
-  '::after',
-  '::before',
-  '::first-letter',
-  '::first-line'
-];
-
-var Level = {
-  DOUBLE_QUOTE: 'double-quote',
-  SINGLE_QUOTE: 'single-quote',
-  ROOT: 'root'
-};
-
-function isMergeable(selector, mergeablePseudoClasses, mergeablePseudoElements, multiplePseudoMerging) {
-  var singleSelectors = split(selector, Marker.COMMA);
-  var singleSelector;
-  var i, l;
-
-  for (i = 0, l = singleSelectors.length; i < l; i++) {
-    singleSelector = singleSelectors[i];
-
-    if (singleSelector.length === 0 ||
-        isDeepSelector(singleSelector) ||
-        (singleSelector.indexOf(Marker.COLON) > -1 && !areMergeable(singleSelector, extractPseudoFrom(singleSelector), mergeablePseudoClasses, mergeablePseudoElements, multiplePseudoMerging))) {
-      return false;
-    }
-  }
-
-  return true;
-}
-
-function isDeepSelector(selector) {
-  return DEEP_SELECTOR_PATTERN.test(selector);
-}
-
-function extractPseudoFrom(selector) {
-  var list = [];
-  var character;
-  var buffer = [];
-  var level = Level.ROOT;
-  var roundBracketLevel = 0;
-  var isQuoted;
-  var isEscaped;
-  var isPseudo = false;
-  var isRelation;
-  var wasColon = false;
-  var index;
-  var len;
-
-  for (index = 0, len = selector.length; index < len; index++) {
-    character = selector[index];
-
-    isRelation = !isEscaped && RELATION_PATTERN.test(character);
-    isQuoted = level == Level.DOUBLE_QUOTE || level == Level.SINGLE_QUOTE;
-
-    if (isEscaped) {
-      buffer.push(character);
-    } else if (character == Marker.DOUBLE_QUOTE && level == Level.ROOT) {
-      buffer.push(character);
-      level = Level.DOUBLE_QUOTE;
-    } else if (character == Marker.DOUBLE_QUOTE && level == Level.DOUBLE_QUOTE) {
-      buffer.push(character);
-      level = Level.ROOT;
-    } else if (character == Marker.SINGLE_QUOTE && level == Level.ROOT) {
-      buffer.push(character);
-      level = Level.SINGLE_QUOTE;
-    } else if (character == Marker.SINGLE_QUOTE && level == Level.SINGLE_QUOTE) {
-      buffer.push(character);
-      level = Level.ROOT;
-    } else if (isQuoted) {
-      buffer.push(character);
-    } else if (character == Marker.OPEN_ROUND_BRACKET) {
-      buffer.push(character);
-      roundBracketLevel++;
-    } else if (character == Marker.CLOSE_ROUND_BRACKET && roundBracketLevel == 1 && isPseudo) {
-      buffer.push(character);
-      list.push(buffer.join(''));
-      roundBracketLevel--;
-      buffer = [];
-      isPseudo = false;
-    } else if (character == Marker.CLOSE_ROUND_BRACKET) {
-      buffer.push(character);
-      roundBracketLevel--;
-    } else if (character == Marker.COLON && roundBracketLevel === 0 && isPseudo && !wasColon) {
-      list.push(buffer.join(''));
-      buffer = [];
-      buffer.push(character);
-    } else if (character == Marker.COLON && roundBracketLevel === 0 && !wasColon) {
-      buffer = [];
-      buffer.push(character);
-      isPseudo = true;
-    } else if (character == Marker.SPACE && roundBracketLevel === 0 && isPseudo) {
-      list.push(buffer.join(''));
-      buffer = [];
-      isPseudo = false;
-    } else if (isRelation && roundBracketLevel === 0 && isPseudo) {
-      list.push(buffer.join(''));
-      buffer = [];
-      isPseudo = false;
-    } else {
-      buffer.push(character);
-    }
-
-    isEscaped = character == Marker.BACK_SLASH;
-    wasColon = character == Marker.COLON;
-  }
-
-  if (buffer.length > 0 && isPseudo) {
-    list.push(buffer.join(''));
-  }
-
-  return list;
-}
-
-function areMergeable(selector, matches, mergeablePseudoClasses, mergeablePseudoElements, multiplePseudoMerging) {
-  return areAllowed(matches, mergeablePseudoClasses, mergeablePseudoElements) &&
-    needArguments(matches) &&
-    (matches.length < 2 || !someIncorrectlyChained(selector, matches)) &&
-    (matches.length < 2 || multiplePseudoMerging && allMixable(matches));
-}
-
-function areAllowed(matches, mergeablePseudoClasses, mergeablePseudoElements) {
-  var match;
-  var name;
-  var i, l;
-
-  for (i = 0, l = matches.length; i < l; i++) {
-    match = matches[i];
-    name = match.indexOf(Marker.OPEN_ROUND_BRACKET) > -1 ?
-      match.substring(0, match.indexOf(Marker.OPEN_ROUND_BRACKET)) :
-      match;
-
-    if (mergeablePseudoClasses.indexOf(name) === -1 && mergeablePseudoElements.indexOf(name) === -1) {
-      return false;
-    }
-  }
-
-  return true;
-}
-
-function needArguments(matches) {
-  var match;
-  var name;
-  var bracketOpensAt;
-  var hasArguments;
-  var i, l;
-
-  for (i = 0, l = matches.length; i < l; i++) {
-    match = matches[i];
-
-    bracketOpensAt = match.indexOf(Marker.OPEN_ROUND_BRACKET);
-    hasArguments = bracketOpensAt > -1;
-    name = hasArguments ?
-      match.substring(0, bracketOpensAt) :
-      match;
-
-    if (hasArguments && PSEUDO_CLASSES_WITH_ARGUMENTS.indexOf(name) == -1) {
-      return false;
-    }
-
-    if (!hasArguments && PSEUDO_CLASSES_WITH_ARGUMENTS.indexOf(name) > -1) {
-      return false;
-    }
-  }
-
-  return true;
-}
-
-function someIncorrectlyChained(selector, matches) {
-  var positionInSelector = 0;
-  var match;
-  var matchAt;
-  var nextMatch;
-  var nextMatchAt;
-  var name;
-  var nextName;
-  var areChained;
-  var i, l;
-
-  for (i = 0, l = matches.length; i < l; i++) {
-    match = matches[i];
-    nextMatch = matches[i + 1];
-
-    if (!nextMatch) {
-      break;
-    }
-
-    matchAt = selector.indexOf(match, positionInSelector);
-    nextMatchAt = selector.indexOf(match, matchAt + 1);
-    positionInSelector = nextMatchAt;
-    areChained = matchAt + match.length == nextMatchAt;
-
-    if (areChained) {
-      name = match.indexOf(Marker.OPEN_ROUND_BRACKET) > -1 ?
-        match.substring(0, match.indexOf(Marker.OPEN_ROUND_BRACKET)) :
-        match;
-      nextName = nextMatch.indexOf(Marker.OPEN_ROUND_BRACKET) > -1 ?
-        nextMatch.substring(0, nextMatch.indexOf(Marker.OPEN_ROUND_BRACKET)) :
-        nextMatch;
-
-      if (name != NOT_PSEUDO || nextName != NOT_PSEUDO) {
-        return true;
-      }
-    }
-  }
-
-  return false;
-}
-
-function allMixable(matches) {
-  var unmixableMatches = 0;
-  var match;
-  var i, l;
-
-  for (i = 0, l = matches.length; i < l; i++) {
-    match = matches[i];
-
-    if (isPseudoElement(match)) {
-      unmixableMatches += UNMIXABLE_PSEUDO_ELEMENTS.indexOf(match) > -1 ? 1 : 0;
-    } else {
-      unmixableMatches += UNMIXABLE_PSEUDO_CLASSES.indexOf(match) > -1 ? 1 : 0;
-    }
-
-    if (unmixableMatches > 1) {
-      return false;
-    }
-  }
-
-  return true;
-}
-
-function isPseudoElement(pseudo) {
-  return DOUBLE_COLON_PATTERN.test(pseudo);
-}
-
-module.exports = isMergeable;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/merge-adjacent.js b/node_modules/clean-css/lib/optimizer/level-2/merge-adjacent.js
deleted file mode 100644
index b148bacd7..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/merge-adjacent.js
+++ /dev/null
@@ -1,50 +0,0 @@
-var isMergeable = require('./is-mergeable');
-
-var optimizeProperties = require('./properties/optimize');
-
-var sortSelectors = require('../level-1/sort-selectors');
-var tidyRules = require('../level-1/tidy-rules');
-
-var OptimizationLevel = require('../../options/optimization-level').OptimizationLevel;
-
-var serializeBody = require('../../writer/one-time').body;
-var serializeRules = require('../../writer/one-time').rules;
-
-var Token = require('../../tokenizer/token');
-
-function mergeAdjacent(tokens, context) {
-  var lastToken = [null, [], []];
-  var options = context.options;
-  var adjacentSpace = options.compatibility.selectors.adjacentSpace;
-  var selectorsSortingMethod = options.level[OptimizationLevel.One].selectorsSortingMethod;
-  var mergeablePseudoClasses = options.compatibility.selectors.mergeablePseudoClasses;
-  var mergeablePseudoElements = options.compatibility.selectors.mergeablePseudoElements;
-  var mergeLimit = options.compatibility.selectors.mergeLimit;
-  var multiplePseudoMerging = options.compatibility.selectors.multiplePseudoMerging;
-
-  for (var i = 0, l = tokens.length; i < l; i++) {
-    var token = tokens[i];
-
-    if (token[0] != Token.RULE) {
-      lastToken = [null, [], []];
-      continue;
-    }
-
-    if (lastToken[0] == Token.RULE && serializeRules(token[1]) == serializeRules(lastToken[1])) {
-      Array.prototype.push.apply(lastToken[2], token[2]);
-      optimizeProperties(lastToken[2], true, true, context);
-      token[2] = [];
-    } else if (lastToken[0] == Token.RULE && serializeBody(token[2]) == serializeBody(lastToken[2]) &&
-        isMergeable(serializeRules(token[1]), mergeablePseudoClasses, mergeablePseudoElements, multiplePseudoMerging) &&
-        isMergeable(serializeRules(lastToken[1]), mergeablePseudoClasses, mergeablePseudoElements, multiplePseudoMerging) &&
-        lastToken[1].length < mergeLimit) {
-      lastToken[1] = tidyRules(lastToken[1].concat(token[1]), false, adjacentSpace, false, context.warnings);
-      lastToken[1] = lastToken.length > 1 ? sortSelectors(lastToken[1], selectorsSortingMethod) : lastToken[1];
-      token[2] = [];
-    } else {
-      lastToken = token;
-    }
-  }
-}
-
-module.exports = mergeAdjacent;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/merge-media-queries.js b/node_modules/clean-css/lib/optimizer/level-2/merge-media-queries.js
deleted file mode 100644
index c3c60dc24..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/merge-media-queries.js
+++ /dev/null
@@ -1,103 +0,0 @@
-var canReorder = require('./reorderable').canReorder;
-var canReorderSingle = require('./reorderable').canReorderSingle;
-var extractProperties = require('./extract-properties');
-var rulesOverlap = require('./rules-overlap');
-
-var serializeRules = require('../../writer/one-time').rules;
-var OptimizationLevel = require('../../options/optimization-level').OptimizationLevel;
-var Token = require('../../tokenizer/token');
-
-function mergeMediaQueries(tokens, context) {
-  var mergeSemantically = context.options.level[OptimizationLevel.Two].mergeSemantically;
-  var specificityCache = context.cache.specificity;
-  var candidates = {};
-  var reduced = [];
-
-  for (var i = tokens.length - 1; i >= 0; i--) {
-    var token = tokens[i];
-    if (token[0] != Token.NESTED_BLOCK) {
-      continue;
-    }
-
-    var key = serializeRules(token[1]);
-    var candidate = candidates[key];
-    if (!candidate) {
-      candidate = [];
-      candidates[key] = candidate;
-    }
-
-    candidate.push(i);
-  }
-
-  for (var name in candidates) {
-    var positions = candidates[name];
-
-    positionLoop:
-    for (var j = positions.length - 1; j > 0; j--) {
-      var positionOne = positions[j];
-      var tokenOne = tokens[positionOne];
-      var positionTwo = positions[j - 1];
-      var tokenTwo = tokens[positionTwo];
-
-      directionLoop:
-      for (var direction = 1; direction >= -1; direction -= 2) {
-        var topToBottom = direction == 1;
-        var from = topToBottom ? positionOne + 1 : positionTwo - 1;
-        var to = topToBottom ? positionTwo : positionOne;
-        var delta = topToBottom ? 1 : -1;
-        var source = topToBottom ? tokenOne : tokenTwo;
-        var target = topToBottom ? tokenTwo : tokenOne;
-        var movedProperties = extractProperties(source);
-
-        while (from != to) {
-          var traversedProperties = extractProperties(tokens[from]);
-          from += delta;
-
-          if (mergeSemantically && allSameRulePropertiesCanBeReordered(movedProperties, traversedProperties, specificityCache)) {
-            continue;
-          }
-
-          if (!canReorder(movedProperties, traversedProperties, specificityCache))
-            continue directionLoop;
-        }
-
-        target[2] = topToBottom ?
-          source[2].concat(target[2]) :
-          target[2].concat(source[2]);
-        source[2] = [];
-
-        reduced.push(target);
-        continue positionLoop;
-      }
-    }
-  }
-
-  return reduced;
-}
-
-function allSameRulePropertiesCanBeReordered(movedProperties, traversedProperties, specificityCache) {
-  var movedProperty;
-  var movedRule;
-  var traversedProperty;
-  var traversedRule;
-  var i, l;
-  var j, m;
-
-  for (i = 0, l = movedProperties.length; i < l; i++) {
-    movedProperty = movedProperties[i];
-    movedRule = movedProperty[5];
-
-    for (j = 0, m = traversedProperties.length; j < m; j++) {
-      traversedProperty = traversedProperties[j];
-      traversedRule = traversedProperty[5];
-
-      if (rulesOverlap(movedRule, traversedRule, true) && !canReorderSingle(movedProperty, traversedProperty, specificityCache)) {
-        return false;
-      }
-    }
-  }
-
-  return true;
-}
-
-module.exports = mergeMediaQueries;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/merge-non-adjacent-by-body.js b/node_modules/clean-css/lib/optimizer/level-2/merge-non-adjacent-by-body.js
deleted file mode 100644
index 82db950fe..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/merge-non-adjacent-by-body.js
+++ /dev/null
@@ -1,80 +0,0 @@
-var isMergeable = require('./is-mergeable');
-
-var sortSelectors = require('../level-1/sort-selectors');
-var tidyRules = require('../level-1/tidy-rules');
-
-var OptimizationLevel = require('../../options/optimization-level').OptimizationLevel;
-
-var serializeBody = require('../../writer/one-time').body;
-var serializeRules = require('../../writer/one-time').rules;
-
-var Token = require('../../tokenizer/token');
-
-function unsafeSelector(value) {
-  return /\.|\*| :/.test(value);
-}
-
-function isBemElement(token) {
-  var asString = serializeRules(token[1]);
-  return asString.indexOf('__') > -1 || asString.indexOf('--') > -1;
-}
-
-function withoutModifier(selector) {
-  return selector.replace(/--[^ ,>\+~:]+/g, '');
-}
-
-function removeAnyUnsafeElements(left, candidates) {
-  var leftSelector = withoutModifier(serializeRules(left[1]));
-
-  for (var body in candidates) {
-    var right = candidates[body];
-    var rightSelector = withoutModifier(serializeRules(right[1]));
-
-    if (rightSelector.indexOf(leftSelector) > -1 || leftSelector.indexOf(rightSelector) > -1)
-      delete candidates[body];
-  }
-}
-
-function mergeNonAdjacentByBody(tokens, context) {
-  var options = context.options;
-  var mergeSemantically = options.level[OptimizationLevel.Two].mergeSemantically;
-  var adjacentSpace = options.compatibility.selectors.adjacentSpace;
-  var selectorsSortingMethod = options.level[OptimizationLevel.One].selectorsSortingMethod;
-  var mergeablePseudoClasses = options.compatibility.selectors.mergeablePseudoClasses;
-  var mergeablePseudoElements = options.compatibility.selectors.mergeablePseudoElements;
-  var multiplePseudoMerging = options.compatibility.selectors.multiplePseudoMerging;
-  var candidates = {};
-
-  for (var i = tokens.length - 1; i >= 0; i--) {
-    var token = tokens[i];
-    if (token[0] != Token.RULE)
-      continue;
-
-    if (token[2].length > 0 && (!mergeSemantically && unsafeSelector(serializeRules(token[1]))))
-      candidates = {};
-
-    if (token[2].length > 0 && mergeSemantically && isBemElement(token))
-      removeAnyUnsafeElements(token, candidates);
-
-    var candidateBody = serializeBody(token[2]);
-    var oldToken = candidates[candidateBody];
-    if (oldToken &&
-        isMergeable(serializeRules(token[1]), mergeablePseudoClasses, mergeablePseudoElements, multiplePseudoMerging) &&
-        isMergeable(serializeRules(oldToken[1]), mergeablePseudoClasses, mergeablePseudoElements, multiplePseudoMerging)) {
-
-      if (token[2].length > 0) {
-        token[1] = tidyRules(oldToken[1].concat(token[1]), false, adjacentSpace, false, context.warnings);
-        token[1] = token[1].length > 1 ? sortSelectors(token[1], selectorsSortingMethod) : token[1];
-      } else {
-        token[1] = oldToken[1].concat(token[1]);
-      }
-
-      oldToken[2] = [];
-      candidates[candidateBody] = null;
-    }
-
-    candidates[serializeBody(token[2])] = token;
-  }
-}
-
-module.exports = mergeNonAdjacentByBody;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/merge-non-adjacent-by-selector.js b/node_modules/clean-css/lib/optimizer/level-2/merge-non-adjacent-by-selector.js
deleted file mode 100644
index 5e23064eb..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/merge-non-adjacent-by-selector.js
+++ /dev/null
@@ -1,78 +0,0 @@
-var canReorder = require('./reorderable').canReorder;
-var extractProperties = require('./extract-properties');
-
-var optimizeProperties = require('./properties/optimize');
-
-var serializeRules = require('../../writer/one-time').rules;
-
-var Token = require('../../tokenizer/token');
-
-function mergeNonAdjacentBySelector(tokens, context) {
-  var specificityCache = context.cache.specificity;
-  var allSelectors = {};
-  var repeatedSelectors = [];
-  var i;
-
-  for (i = tokens.length - 1; i >= 0; i--) {
-    if (tokens[i][0] != Token.RULE)
-      continue;
-    if (tokens[i][2].length === 0)
-      continue;
-
-    var selector = serializeRules(tokens[i][1]);
-    allSelectors[selector] = [i].concat(allSelectors[selector] || []);
-
-    if (allSelectors[selector].length == 2)
-      repeatedSelectors.push(selector);
-  }
-
-  for (i = repeatedSelectors.length - 1; i >= 0; i--) {
-    var positions = allSelectors[repeatedSelectors[i]];
-
-    selectorIterator:
-    for (var j = positions.length - 1; j > 0; j--) {
-      var positionOne = positions[j - 1];
-      var tokenOne = tokens[positionOne];
-      var positionTwo = positions[j];
-      var tokenTwo = tokens[positionTwo];
-
-      directionIterator:
-      for (var direction = 1; direction >= -1; direction -= 2) {
-        var topToBottom = direction == 1;
-        var from = topToBottom ? positionOne + 1 : positionTwo - 1;
-        var to = topToBottom ? positionTwo : positionOne;
-        var delta = topToBottom ? 1 : -1;
-        var moved = topToBottom ? tokenOne : tokenTwo;
-        var target = topToBottom ? tokenTwo : tokenOne;
-        var movedProperties = extractProperties(moved);
-
-        while (from != to) {
-          var traversedProperties = extractProperties(tokens[from]);
-          from += delta;
-
-          // traversed then moved as we move selectors towards the start
-          var reorderable = topToBottom ?
-            canReorder(movedProperties, traversedProperties, specificityCache) :
-            canReorder(traversedProperties, movedProperties, specificityCache);
-
-          if (!reorderable && !topToBottom)
-            continue selectorIterator;
-          if (!reorderable && topToBottom)
-            continue directionIterator;
-        }
-
-        if (topToBottom) {
-          Array.prototype.push.apply(moved[2], target[2]);
-          target[2] = moved[2];
-        } else {
-          Array.prototype.push.apply(target[2], moved[2]);
-        }
-
-        optimizeProperties(target[2], true, true, context);
-        moved[2] = [];
-      }
-    }
-  }
-}
-
-module.exports = mergeNonAdjacentBySelector;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/optimize.js b/node_modules/clean-css/lib/optimizer/level-2/optimize.js
deleted file mode 100644
index 9be961d09..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/optimize.js
+++ /dev/null
@@ -1,134 +0,0 @@
-var mergeAdjacent = require('./merge-adjacent');
-var mergeMediaQueries = require('./merge-media-queries');
-var mergeNonAdjacentByBody = require('./merge-non-adjacent-by-body');
-var mergeNonAdjacentBySelector = require('./merge-non-adjacent-by-selector');
-var reduceNonAdjacent = require('./reduce-non-adjacent');
-var removeDuplicateFontAtRules = require('./remove-duplicate-font-at-rules');
-var removeDuplicateMediaQueries = require('./remove-duplicate-media-queries');
-var removeDuplicates = require('./remove-duplicates');
-var removeUnusedAtRules = require('./remove-unused-at-rules');
-var restructure = require('./restructure');
-
-var optimizeProperties = require('./properties/optimize');
-
-var OptimizationLevel = require('../../options/optimization-level').OptimizationLevel;
-
-var Token = require('../../tokenizer/token');
-
-function removeEmpty(tokens) {
-  for (var i = 0, l = tokens.length; i < l; i++) {
-    var token = tokens[i];
-    var isEmpty = false;
-
-    switch (token[0]) {
-      case Token.RULE:
-        isEmpty = token[1].length === 0 || token[2].length === 0;
-        break;
-      case Token.NESTED_BLOCK:
-        removeEmpty(token[2]);
-        isEmpty = token[2].length === 0;
-        break;
-      case Token.AT_RULE:
-        isEmpty = token[1].length === 0;
-        break;
-      case Token.AT_RULE_BLOCK:
-        isEmpty = token[2].length === 0;
-    }
-
-    if (isEmpty) {
-      tokens.splice(i, 1);
-      i--;
-      l--;
-    }
-  }
-}
-
-function recursivelyOptimizeBlocks(tokens, context) {
-  for (var i = 0, l = tokens.length; i < l; i++) {
-    var token = tokens[i];
-
-    if (token[0] == Token.NESTED_BLOCK) {
-      var isKeyframes = /@(-moz-|-o-|-webkit-)?keyframes/.test(token[1][0][1]);
-      level2Optimize(token[2], context, !isKeyframes);
-    }
-  }
-}
-
-function recursivelyOptimizeProperties(tokens, context) {
-  for (var i = 0, l = tokens.length; i < l; i++) {
-    var token = tokens[i];
-
-    switch (token[0]) {
-      case Token.RULE:
-        optimizeProperties(token[2], true, true, context);
-        break;
-      case Token.NESTED_BLOCK:
-        recursivelyOptimizeProperties(token[2], context);
-    }
-  }
-}
-
-function level2Optimize(tokens, context, withRestructuring) {
-  var levelOptions = context.options.level[OptimizationLevel.Two];
-  var reduced;
-  var i;
-
-  recursivelyOptimizeBlocks(tokens, context);
-  recursivelyOptimizeProperties(tokens, context);
-
-  if (levelOptions.removeDuplicateRules) {
-    removeDuplicates(tokens, context);
-  }
-
-  if (levelOptions.mergeAdjacentRules) {
-    mergeAdjacent(tokens, context);
-  }
-
-  if (levelOptions.reduceNonAdjacentRules) {
-    reduceNonAdjacent(tokens, context);
-  }
-
-  if (levelOptions.mergeNonAdjacentRules && levelOptions.mergeNonAdjacentRules != 'body') {
-    mergeNonAdjacentBySelector(tokens, context);
-  }
-
-  if (levelOptions.mergeNonAdjacentRules && levelOptions.mergeNonAdjacentRules != 'selector') {
-    mergeNonAdjacentByBody(tokens, context);
-  }
-
-  if (levelOptions.restructureRules && levelOptions.mergeAdjacentRules && withRestructuring) {
-    restructure(tokens, context);
-    mergeAdjacent(tokens, context);
-  }
-
-  if (levelOptions.restructureRules && !levelOptions.mergeAdjacentRules && withRestructuring) {
-    restructure(tokens, context);
-  }
-
-  if (levelOptions.removeDuplicateFontRules) {
-    removeDuplicateFontAtRules(tokens, context);
-  }
-
-  if (levelOptions.removeDuplicateMediaBlocks) {
-    removeDuplicateMediaQueries(tokens, context);
-  }
-
-  if (levelOptions.removeUnusedAtRules) {
-    removeUnusedAtRules(tokens, context);
-  }
-
-  if (levelOptions.mergeMedia) {
-    reduced = mergeMediaQueries(tokens, context);
-    for (i = reduced.length - 1; i >= 0; i--) {
-      level2Optimize(reduced[i][2], context, false);
-    }
-  }
-
-  if (levelOptions.removeEmpty) {
-    removeEmpty(tokens);
-  }
-
-  return tokens;
-}
-
-module.exports = level2Optimize;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/properties/every-values-pair.js b/node_modules/clean-css/lib/optimizer/level-2/properties/every-values-pair.js
deleted file mode 100644
index 44fcb7d53..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/properties/every-values-pair.js
+++ /dev/null
@@ -1,28 +0,0 @@
-var Marker = require('../../../tokenizer/marker');
-
-function everyValuesPair(fn, left, right) {
-  var leftSize = left.value.length;
-  var rightSize = right.value.length;
-  var total = Math.max(leftSize, rightSize);
-  var lowerBound = Math.min(leftSize, rightSize) - 1;
-  var leftValue;
-  var rightValue;
-  var position;
-
-  for (position = 0; position < total; position++) {
-    leftValue = left.value[position] && left.value[position][1] || leftValue;
-    rightValue = right.value[position] && right.value[position][1] || rightValue;
-
-    if (leftValue == Marker.COMMA || rightValue == Marker.COMMA) {
-      continue;
-    }
-
-    if (!fn(leftValue, rightValue, position, position <= lowerBound)) {
-      return false;
-    }
-  }
-
-  return true;
-}
-
-module.exports = everyValuesPair;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/properties/find-component-in.js b/node_modules/clean-css/lib/optimizer/level-2/properties/find-component-in.js
deleted file mode 100644
index dd7c719d5..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/properties/find-component-in.js
+++ /dev/null
@@ -1,40 +0,0 @@
-var compactable = require('../compactable');
-
-function findComponentIn(shorthand, longhand) {
-  var comparator = nameComparator(longhand);
-
-  return findInDirectComponents(shorthand, comparator) || findInSubComponents(shorthand, comparator);
-}
-
-function nameComparator(to) {
-  return function (property) {
-    return to.name === property.name;
-  };
-}
-
-function findInDirectComponents(shorthand, comparator) {
-  return shorthand.components.filter(comparator)[0];
-}
-
-function findInSubComponents(shorthand, comparator) {
-  var shorthandComponent;
-  var longhandMatch;
-  var i, l;
-
-  if (!compactable[shorthand.name].shorthandComponents) {
-    return;
-  }
-
-  for (i = 0, l = shorthand.components.length; i < l; i++) {
-    shorthandComponent = shorthand.components[i];
-    longhandMatch = findInDirectComponents(shorthandComponent, comparator);
-
-    if (longhandMatch) {
-      return longhandMatch;
-    }
-  }
-
-  return;
-}
-
-module.exports = findComponentIn;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/properties/has-inherit.js b/node_modules/clean-css/lib/optimizer/level-2/properties/has-inherit.js
deleted file mode 100644
index 84f220d32..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/properties/has-inherit.js
+++ /dev/null
@@ -1,10 +0,0 @@
-function hasInherit(property) {
-  for (var i = property.value.length - 1; i >= 0; i--) {
-    if (property.value[i][1] == 'inherit')
-      return true;
-  }
-
-  return false;
-}
-
-module.exports = hasInherit;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/properties/is-component-of.js b/node_modules/clean-css/lib/optimizer/level-2/properties/is-component-of.js
deleted file mode 100644
index 237de7d10..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/properties/is-component-of.js
+++ /dev/null
@@ -1,22 +0,0 @@
-var compactable = require('../compactable');
-
-function isComponentOf(property1, property2, shallow) {
-  return isDirectComponentOf(property1, property2) ||
-    !shallow && !!compactable[property1.name].shorthandComponents && isSubComponentOf(property1, property2);
-}
-
-function isDirectComponentOf(property1, property2) {
-  var descriptor = compactable[property1.name];
-
-  return 'components' in descriptor && descriptor.components.indexOf(property2.name) > -1;
-}
-
-function isSubComponentOf(property1, property2) {
-  return property1
-    .components
-    .some(function (component) {
-      return isDirectComponentOf(component, property2);
-    });
-}
-
-module.exports = isComponentOf;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/properties/is-mergeable-shorthand.js b/node_modules/clean-css/lib/optimizer/level-2/properties/is-mergeable-shorthand.js
deleted file mode 100644
index ee7191ef6..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/properties/is-mergeable-shorthand.js
+++ /dev/null
@@ -1,11 +0,0 @@
-var Marker = require('../../../tokenizer/marker');
-
-function isMergeableShorthand(shorthand) {
-  if (shorthand.name != 'font') {
-    return true;
-  }
-
-  return shorthand.value[0][1].indexOf(Marker.INTERNAL) == -1;
-}
-
-module.exports = isMergeableShorthand;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/properties/merge-into-shorthands.js b/node_modules/clean-css/lib/optimizer/level-2/properties/merge-into-shorthands.js
deleted file mode 100644
index bcfeeb609..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/properties/merge-into-shorthands.js
+++ /dev/null
@@ -1,445 +0,0 @@
-var everyValuesPair = require('./every-values-pair');
-var hasInherit = require('./has-inherit');
-var populateComponents = require('./populate-components');
-
-var compactable = require('../compactable');
-var deepClone = require('../clone').deep;
-var restoreWithComponents = require('../restore-with-components');
-
-var restoreFromOptimizing = require('../../restore-from-optimizing');
-var wrapSingle = require('../../wrap-for-optimizing').single;
-
-var serializeBody = require('../../../writer/one-time').body;
-var Token = require('../../../tokenizer/token');
-
-function mergeIntoShorthands(properties, validator) {
-  var candidates = {};
-  var descriptor;
-  var componentOf;
-  var property;
-  var i, l;
-  var j, m;
-
-  // there is no shorthand property made up of less than 3 longhands
-  if (properties.length < 3) {
-    return;
-  }
-
-  for (i = 0, l = properties.length; i < l; i++) {
-    property = properties[i];
-    descriptor = compactable[property.name];
-
-    if (property.unused) {
-      continue;
-    }
-
-    if (property.hack) {
-      continue;
-    }
-
-    if (property.block) {
-      continue;
-    }
-
-    invalidateOrCompact(properties, i, candidates, validator);
-
-    if (descriptor && descriptor.componentOf) {
-      for (j = 0, m = descriptor.componentOf.length; j < m; j++) {
-        componentOf = descriptor.componentOf[j];
-
-        candidates[componentOf] = candidates[componentOf] || {};
-        candidates[componentOf][property.name] = property;
-      }
-    }
-  }
-
-  invalidateOrCompact(properties, i, candidates, validator);
-}
-
-function invalidateOrCompact(properties, position, candidates, validator) {
-  var invalidatedBy = properties[position];
-  var shorthandName;
-  var shorthandDescriptor;
-  var candidateComponents;
-
-  for (shorthandName in candidates) {
-    if (undefined !== invalidatedBy && shorthandName == invalidatedBy.name) {
-      continue;
-    }
-
-    shorthandDescriptor = compactable[shorthandName];
-    candidateComponents = candidates[shorthandName];
-    if (invalidatedBy && invalidates(candidates, shorthandName, invalidatedBy)) {
-      delete candidates[shorthandName];
-      continue;
-    }
-
-    if (shorthandDescriptor.components.length > Object.keys(candidateComponents).length) {
-      continue;
-    }
-
-    if (mixedImportance(candidateComponents)) {
-      continue;
-    }
-
-    if (!overridable(candidateComponents, shorthandName, validator)) {
-      continue;
-    }
-
-    if (!mergeable(candidateComponents)) {
-      continue;
-    }
-
-    if (mixedInherit(candidateComponents)) {
-      replaceWithInheritBestFit(properties, candidateComponents, shorthandName, validator);
-    } else {
-      replaceWithShorthand(properties, candidateComponents, shorthandName, validator);
-    }
-  }
-}
-
-function invalidates(candidates, shorthandName, invalidatedBy) {
-  var shorthandDescriptor = compactable[shorthandName];
-  var invalidatedByDescriptor = compactable[invalidatedBy.name];
-  var componentName;
-
-  if ('overridesShorthands' in shorthandDescriptor && shorthandDescriptor.overridesShorthands.indexOf(invalidatedBy.name) > -1) {
-    return true;
-  }
-
-  if (invalidatedByDescriptor && 'componentOf' in invalidatedByDescriptor) {
-    for (componentName in candidates[shorthandName]) {
-      if (invalidatedByDescriptor.componentOf.indexOf(componentName) > -1) {
-        return true;
-      }
-    }
-  }
-
-  return false;
-}
-
-function mixedImportance(components) {
-  var important;
-  var componentName;
-
-  for (componentName in components) {
-    if (undefined !== important && components[componentName].important != important) {
-      return true;
-    }
-
-    important = components[componentName].important;
-  }
-
-  return false;
-}
-
-function overridable(components, shorthandName, validator) {
-  var descriptor = compactable[shorthandName];
-  var newValuePlaceholder = [
-    Token.PROPERTY,
-    [Token.PROPERTY_NAME, shorthandName],
-    [Token.PROPERTY_VALUE, descriptor.defaultValue]
-  ];
-  var newProperty = wrapSingle(newValuePlaceholder);
-  var component;
-  var mayOverride;
-  var i, l;
-
-  populateComponents([newProperty], validator, []);
-
-  for (i = 0, l = descriptor.components.length; i < l; i++) {
-    component = components[descriptor.components[i]];
-    mayOverride = compactable[component.name].canOverride;
-
-    if (!everyValuesPair(mayOverride.bind(null, validator), newProperty.components[i], component)) {
-      return false;
-    }
-  }
-
-  return true;
-}
-
-function mergeable(components) {
-  var lastCount = null;
-  var currentCount;
-  var componentName;
-  var component;
-  var descriptor;
-  var values;
-
-  for (componentName in components) {
-    component = components[componentName];
-    descriptor = compactable[componentName];
-
-    if (!('restore' in descriptor)) {
-      continue;
-    }
-
-    restoreFromOptimizing([component.all[component.position]], restoreWithComponents);
-    values = descriptor.restore(component, compactable);
-
-    currentCount = values.length;
-
-    if (lastCount !== null && currentCount !== lastCount) {
-      return false;
-    }
-
-    lastCount = currentCount;
-  }
-
-  return true;
-}
-
-function mixedInherit(components) {
-  var componentName;
-  var lastValue = null;
-  var currentValue;
-
-  for (componentName in components) {
-    currentValue = hasInherit(components[componentName]);
-
-    if (lastValue !== null && lastValue !== currentValue) {
-      return true;
-    }
-
-    lastValue = currentValue;
-  }
-
-  return false;
-}
-
-function replaceWithInheritBestFit(properties, candidateComponents, shorthandName, validator) {
-  var viaLonghands = buildSequenceWithInheritLonghands(candidateComponents, shorthandName, validator);
-  var viaShorthand = buildSequenceWithInheritShorthand(candidateComponents, shorthandName, validator);
-  var longhandTokensSequence = viaLonghands[0];
-  var shorthandTokensSequence = viaShorthand[0];
-  var isLonghandsShorter = serializeBody(longhandTokensSequence).length < serializeBody(shorthandTokensSequence).length;
-  var newTokensSequence = isLonghandsShorter ? longhandTokensSequence : shorthandTokensSequence;
-  var newProperty = isLonghandsShorter ? viaLonghands[1] : viaShorthand[1];
-  var newComponents = isLonghandsShorter ? viaLonghands[2] : viaShorthand[2];
-  var all = candidateComponents[Object.keys(candidateComponents)[0]].all;
-  var componentName;
-  var oldComponent;
-  var newComponent;
-  var newToken;
-
-  newProperty.position = all.length;
-  newProperty.shorthand = true;
-  newProperty.dirty = true;
-  newProperty.all = all;
-  newProperty.all.push(newTokensSequence[0]);
-
-  properties.push(newProperty);
-
-  for (componentName in candidateComponents) {
-    oldComponent = candidateComponents[componentName];
-    oldComponent.unused = true;
-
-    if (oldComponent.name in newComponents) {
-      newComponent = newComponents[oldComponent.name];
-      newToken = findTokenIn(newTokensSequence, componentName);
-
-      newComponent.position = all.length;
-      newComponent.all = all;
-      newComponent.all.push(newToken);
-
-      properties.push(newComponent);
-    }
-  }
-}
-
-function buildSequenceWithInheritLonghands(components, shorthandName, validator) {
-  var tokensSequence = [];
-  var inheritComponents = {};
-  var nonInheritComponents = {};
-  var descriptor = compactable[shorthandName];
-  var shorthandToken = [
-    Token.PROPERTY,
-    [Token.PROPERTY_NAME, shorthandName],
-    [Token.PROPERTY_VALUE, descriptor.defaultValue]
-  ];
-  var newProperty = wrapSingle(shorthandToken);
-  var component;
-  var longhandToken;
-  var newComponent;
-  var nameMetadata;
-  var i, l;
-
-  populateComponents([newProperty], validator, []);
-
-  for (i = 0, l = descriptor.components.length; i < l; i++) {
-    component = components[descriptor.components[i]];
-
-    if (hasInherit(component)) {
-      longhandToken = component.all[component.position].slice(0, 2);
-      Array.prototype.push.apply(longhandToken, component.value);
-      tokensSequence.push(longhandToken);
-
-      newComponent = deepClone(component);
-      newComponent.value = inferComponentValue(components, newComponent.name);
-
-      newProperty.components[i] = newComponent;
-      inheritComponents[component.name] = deepClone(component);
-    } else {
-      newComponent = deepClone(component);
-      newComponent.all = component.all;
-      newProperty.components[i] = newComponent;
-
-      nonInheritComponents[component.name] = component;
-    }
-  }
-
-  nameMetadata = joinMetadata(nonInheritComponents, 1);
-  shorthandToken[1].push(nameMetadata);
-
-  restoreFromOptimizing([newProperty], restoreWithComponents);
-
-  shorthandToken = shorthandToken.slice(0, 2);
-  Array.prototype.push.apply(shorthandToken, newProperty.value);
-
-  tokensSequence.unshift(shorthandToken);
-
-  return [tokensSequence, newProperty, inheritComponents];
-}
-
-function inferComponentValue(components, propertyName) {
-  var descriptor = compactable[propertyName];
-
-  if ('oppositeTo' in descriptor) {
-    return components[descriptor.oppositeTo].value;
-  } else {
-    return [[Token.PROPERTY_VALUE, descriptor.defaultValue]];
-  }
-}
-
-function joinMetadata(components, at) {
-  var metadata = [];
-  var component;
-  var originalValue;
-  var componentMetadata;
-  var componentName;
-
-  for (componentName in components) {
-    component = components[componentName];
-    originalValue = component.all[component.position];
-    componentMetadata = originalValue[at][originalValue[at].length - 1];
-
-    Array.prototype.push.apply(metadata, componentMetadata);
-  }
-
-  return metadata.sort(metadataSorter);
-}
-
-function metadataSorter(metadata1, metadata2) {
-  var line1 = metadata1[0];
-  var line2 = metadata2[0];
-  var column1 = metadata1[1];
-  var column2 = metadata2[1];
-
-  if (line1 < line2) {
-    return -1;
-  } else if (line1 === line2) {
-    return column1 < column2 ? -1 : 1;
-  } else {
-    return 1;
-  }
-}
-
-function buildSequenceWithInheritShorthand(components, shorthandName, validator) {
-  var tokensSequence = [];
-  var inheritComponents = {};
-  var nonInheritComponents = {};
-  var descriptor = compactable[shorthandName];
-  var shorthandToken = [
-    Token.PROPERTY,
-    [Token.PROPERTY_NAME, shorthandName],
-    [Token.PROPERTY_VALUE, 'inherit']
-  ];
-  var newProperty = wrapSingle(shorthandToken);
-  var component;
-  var longhandToken;
-  var nameMetadata;
-  var valueMetadata;
-  var i, l;
-
-  populateComponents([newProperty], validator, []);
-
-  for (i = 0, l = descriptor.components.length; i < l; i++) {
-    component = components[descriptor.components[i]];
-
-    if (hasInherit(component)) {
-      inheritComponents[component.name] = component;
-    } else {
-      longhandToken = component.all[component.position].slice(0, 2);
-      Array.prototype.push.apply(longhandToken, component.value);
-      tokensSequence.push(longhandToken);
-
-      nonInheritComponents[component.name] = deepClone(component);
-    }
-  }
-
-  nameMetadata = joinMetadata(inheritComponents, 1);
-  shorthandToken[1].push(nameMetadata);
-
-  valueMetadata = joinMetadata(inheritComponents, 2);
-  shorthandToken[2].push(valueMetadata);
-
-  tokensSequence.unshift(shorthandToken);
-
-  return [tokensSequence, newProperty, nonInheritComponents];
-}
-
-function findTokenIn(tokens, componentName) {
-  var i, l;
-
-  for (i = 0, l = tokens.length; i < l; i++) {
-    if (tokens[i][1][1] == componentName) {
-      return tokens[i];
-    }
-  }
-}
-
-function replaceWithShorthand(properties, candidateComponents, shorthandName, validator) {
-  var descriptor = compactable[shorthandName];
-  var nameMetadata;
-  var valueMetadata;
-  var newValuePlaceholder = [
-    Token.PROPERTY,
-    [Token.PROPERTY_NAME, shorthandName],
-    [Token.PROPERTY_VALUE, descriptor.defaultValue]
-  ];
-  var all;
-
-  var newProperty = wrapSingle(newValuePlaceholder);
-  newProperty.shorthand = true;
-  newProperty.dirty = true;
-
-  populateComponents([newProperty], validator, []);
-
-  for (var i = 0, l = descriptor.components.length; i < l; i++) {
-    var component = candidateComponents[descriptor.components[i]];
-
-    newProperty.components[i] = deepClone(component);
-    newProperty.important = component.important;
-
-    all = component.all;
-  }
-
-  for (var componentName in candidateComponents) {
-    candidateComponents[componentName].unused = true;
-  }
-
-  nameMetadata = joinMetadata(candidateComponents, 1);
-  newValuePlaceholder[1].push(nameMetadata);
-
-  valueMetadata = joinMetadata(candidateComponents, 2);
-  newValuePlaceholder[2].push(valueMetadata);
-
-  newProperty.position = all.length;
-  newProperty.all = all;
-  newProperty.all.push(newValuePlaceholder);
-
-  properties.push(newProperty);
-}
-
-module.exports = mergeIntoShorthands;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/properties/optimize.js b/node_modules/clean-css/lib/optimizer/level-2/properties/optimize.js
deleted file mode 100644
index 5dc4bfb98..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/properties/optimize.js
+++ /dev/null
@@ -1,40 +0,0 @@
-var mergeIntoShorthands = require('./merge-into-shorthands');
-var overrideProperties = require('./override-properties');
-var populateComponents = require('./populate-components');
-
-var restoreWithComponents = require('../restore-with-components');
-
-var wrapForOptimizing = require('../../wrap-for-optimizing').all;
-var removeUnused = require('../../remove-unused');
-var restoreFromOptimizing = require('../../restore-from-optimizing');
-
-var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
-
-function optimizeProperties(properties, withOverriding, withMerging, context) {
-  var levelOptions = context.options.level[OptimizationLevel.Two];
-  var _properties = wrapForOptimizing(properties, false, levelOptions.skipProperties);
-  var _property;
-  var i, l;
-
-  populateComponents(_properties, context.validator, context.warnings);
-
-  for (i = 0, l = _properties.length; i < l; i++) {
-    _property = _properties[i];
-    if (_property.block) {
-      optimizeProperties(_property.value[0][1], withOverriding, withMerging, context);
-    }
-  }
-
-  if (withMerging && levelOptions.mergeIntoShorthands) {
-    mergeIntoShorthands(_properties, context.validator);
-  }
-
-  if (withOverriding && levelOptions.overrideProperties) {
-    overrideProperties(_properties, withMerging, context.options.compatibility, context.validator);
-  }
-
-  restoreFromOptimizing(_properties, restoreWithComponents);
-  removeUnused(_properties);
-}
-
-module.exports = optimizeProperties;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/properties/override-properties.js b/node_modules/clean-css/lib/optimizer/level-2/properties/override-properties.js
deleted file mode 100644
index 0f7b97a9f..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/properties/override-properties.js
+++ /dev/null
@@ -1,484 +0,0 @@
-var hasInherit = require('./has-inherit');
-var everyValuesPair = require('./every-values-pair');
-var findComponentIn = require('./find-component-in');
-var isComponentOf = require('./is-component-of');
-var isMergeableShorthand = require('./is-mergeable-shorthand');
-var overridesNonComponentShorthand = require('./overrides-non-component-shorthand');
-var sameVendorPrefixesIn = require('./vendor-prefixes').same;
-
-var compactable = require('../compactable');
-var deepClone = require('../clone').deep;
-var restoreWithComponents = require('../restore-with-components');
-var shallowClone = require('../clone').shallow;
-
-var restoreFromOptimizing = require('../../restore-from-optimizing');
-
-var Token = require('../../../tokenizer/token');
-var Marker = require('../../../tokenizer/marker');
-
-var serializeProperty = require('../../../writer/one-time').property;
-
-function wouldBreakCompatibility(property, validator) {
-  for (var i = 0; i < property.components.length; i++) {
-    var component = property.components[i];
-    var descriptor = compactable[component.name];
-    var canOverride = descriptor && descriptor.canOverride || canOverride.sameValue;
-
-    var _component = shallowClone(component);
-    _component.value = [[Token.PROPERTY_VALUE, descriptor.defaultValue]];
-
-    if (!everyValuesPair(canOverride.bind(null, validator), _component, component)) {
-      return true;
-    }
-  }
-
-  return false;
-}
-
-function overrideIntoMultiplex(property, by) {
-  by.unused = true;
-
-  turnIntoMultiplex(by, multiplexSize(property));
-  property.value = by.value;
-}
-
-function overrideByMultiplex(property, by) {
-  by.unused = true;
-  property.multiplex = true;
-  property.value = by.value;
-}
-
-function overrideSimple(property, by) {
-  by.unused = true;
-  property.value = by.value;
-}
-
-function override(property, by) {
-  if (by.multiplex)
-    overrideByMultiplex(property, by);
-  else if (property.multiplex)
-    overrideIntoMultiplex(property, by);
-  else
-    overrideSimple(property, by);
-}
-
-function overrideShorthand(property, by) {
-  by.unused = true;
-
-  for (var i = 0, l = property.components.length; i < l; i++) {
-    override(property.components[i], by.components[i], property.multiplex);
-  }
-}
-
-function turnIntoMultiplex(property, size) {
-  property.multiplex = true;
-
-  if (compactable[property.name].shorthand) {
-    turnShorthandValueIntoMultiplex(property, size);
-  } else {
-    turnLonghandValueIntoMultiplex(property, size);
-  }
-}
-
-function turnShorthandValueIntoMultiplex(property, size) {
-  var component;
-  var i, l;
-
-  for (i = 0, l = property.components.length; i < l; i++) {
-    component = property.components[i];
-
-    if (!component.multiplex) {
-      turnLonghandValueIntoMultiplex(component, size);
-    }
-  }
-}
-
-function turnLonghandValueIntoMultiplex(property, size) {
-  var descriptor = compactable[property.name];
-  var withRealValue = descriptor.intoMultiplexMode == 'real';
-  var withValue = descriptor.intoMultiplexMode == 'real' ?
-    property.value.slice(0) :
-    (descriptor.intoMultiplexMode == 'placeholder' ? descriptor.placeholderValue : descriptor.defaultValue);
-  var i = multiplexSize(property);
-  var j;
-  var m = withValue.length;
-
-  for (; i < size; i++) {
-    property.value.push([Token.PROPERTY_VALUE, Marker.COMMA]);
-
-    if (Array.isArray(withValue)) {
-      for (j = 0; j < m; j++) {
-        property.value.push(withRealValue ? withValue[j] : [Token.PROPERTY_VALUE, withValue[j]]);
-      }
-    } else {
-      property.value.push(withRealValue ? withValue : [Token.PROPERTY_VALUE, withValue]);
-    }
-  }
-}
-
-function multiplexSize(component) {
-  var size = 0;
-
-  for (var i = 0, l = component.value.length; i < l; i++) {
-    if (component.value[i][1] == Marker.COMMA)
-      size++;
-  }
-
-  return size + 1;
-}
-
-function lengthOf(property) {
-  var fakeAsArray = [
-    Token.PROPERTY,
-    [Token.PROPERTY_NAME, property.name]
-  ].concat(property.value);
-  return serializeProperty([fakeAsArray], 0).length;
-}
-
-function moreSameShorthands(properties, startAt, name) {
-  // Since we run the main loop in `compactOverrides` backwards, at this point some
-  // properties may not be marked as unused.
-  // We should consider reverting the order if possible
-  var count = 0;
-
-  for (var i = startAt; i >= 0; i--) {
-    if (properties[i].name == name && !properties[i].unused)
-      count++;
-    if (count > 1)
-      break;
-  }
-
-  return count > 1;
-}
-
-function overridingFunction(shorthand, validator) {
-  for (var i = 0, l = shorthand.components.length; i < l; i++) {
-    if (!anyValue(validator.isUrl, shorthand.components[i]) && anyValue(validator.isFunction, shorthand.components[i])) {
-      return true;
-    }
-  }
-
-  return false;
-}
-
-function anyValue(fn, property) {
-  for (var i = 0, l = property.value.length; i < l; i++) {
-    if (property.value[i][1] == Marker.COMMA)
-      continue;
-
-    if (fn(property.value[i][1]))
-      return true;
-  }
-
-  return false;
-}
-
-function wouldResultInLongerValue(left, right) {
-  if (!left.multiplex && !right.multiplex || left.multiplex && right.multiplex)
-    return false;
-
-  var multiplex = left.multiplex ? left : right;
-  var simple = left.multiplex ? right : left;
-  var component;
-
-  var multiplexClone = deepClone(multiplex);
-  restoreFromOptimizing([multiplexClone], restoreWithComponents);
-
-  var simpleClone = deepClone(simple);
-  restoreFromOptimizing([simpleClone], restoreWithComponents);
-
-  var lengthBefore = lengthOf(multiplexClone) + 1 + lengthOf(simpleClone);
-
-  if (left.multiplex) {
-    component = findComponentIn(multiplexClone, simpleClone);
-    overrideIntoMultiplex(component, simpleClone);
-  } else {
-    component = findComponentIn(simpleClone, multiplexClone);
-    turnIntoMultiplex(simpleClone, multiplexSize(multiplexClone));
-    overrideByMultiplex(component, multiplexClone);
-  }
-
-  restoreFromOptimizing([simpleClone], restoreWithComponents);
-
-  var lengthAfter = lengthOf(simpleClone);
-
-  return lengthBefore <= lengthAfter;
-}
-
-function isCompactable(property) {
-  return property.name in compactable;
-}
-
-function noneOverrideHack(left, right) {
-  return !left.multiplex &&
-    (left.name == 'background' || left.name == 'background-image') &&
-    right.multiplex &&
-    (right.name == 'background' || right.name == 'background-image') &&
-    anyLayerIsNone(right.value);
-}
-
-function anyLayerIsNone(values) {
-  var layers = intoLayers(values);
-
-  for (var i = 0, l = layers.length; i < l; i++) {
-    if (layers[i].length == 1 && layers[i][0][1] == 'none')
-      return true;
-  }
-
-  return false;
-}
-
-function intoLayers(values) {
-  var layers = [];
-
-  for (var i = 0, layer = [], l = values.length; i < l; i++) {
-    var value = values[i];
-    if (value[1] == Marker.COMMA) {
-      layers.push(layer);
-      layer = [];
-    } else {
-      layer.push(value);
-    }
-  }
-
-  layers.push(layer);
-  return layers;
-}
-
-function overrideProperties(properties, withMerging, compatibility, validator) {
-  var mayOverride, right, left, component;
-  var overriddenComponents;
-  var overriddenComponent;
-  var overridingComponent;
-  var overridable;
-  var i, j, k;
-
-  propertyLoop:
-  for (i = properties.length - 1; i >= 0; i--) {
-    right = properties[i];
-
-    if (!isCompactable(right))
-      continue;
-
-    if (right.block)
-      continue;
-
-    mayOverride = compactable[right.name].canOverride;
-
-    traverseLoop:
-    for (j = i - 1; j >= 0; j--) {
-      left = properties[j];
-
-      if (!isCompactable(left))
-        continue;
-
-      if (left.block)
-        continue;
-
-      if (left.unused || right.unused)
-        continue;
-
-      if (left.hack && !right.hack && !right.important || !left.hack && !left.important && right.hack)
-        continue;
-
-      if (left.important == right.important && left.hack[0] != right.hack[0])
-        continue;
-
-      if (left.important == right.important && (left.hack[0] != right.hack[0] || (left.hack[1] && left.hack[1] != right.hack[1])))
-        continue;
-
-      if (hasInherit(right))
-        continue;
-
-      if (noneOverrideHack(left, right))
-        continue;
-
-      if (right.shorthand && isComponentOf(right, left)) {
-        // maybe `left` can be overridden by `right` which is a shorthand?
-        if (!right.important && left.important)
-          continue;
-
-        if (!sameVendorPrefixesIn([left], right.components))
-          continue;
-
-        if (!anyValue(validator.isFunction, left) && overridingFunction(right, validator))
-          continue;
-
-        if (!isMergeableShorthand(right)) {
-          left.unused = true;
-          continue;
-        }
-
-        component = findComponentIn(right, left);
-        mayOverride = compactable[left.name].canOverride;
-        if (everyValuesPair(mayOverride.bind(null, validator), left, component)) {
-          left.unused = true;
-        }
-      } else if (right.shorthand && overridesNonComponentShorthand(right, left)) {
-        // `right` is a shorthand while `left` can be overriden by it, think `border` and `border-top`
-        if (!right.important && left.important) {
-          continue;
-        }
-
-        if (!sameVendorPrefixesIn([left], right.components)) {
-          continue;
-        }
-
-        if (!anyValue(validator.isFunction, left) && overridingFunction(right, validator)) {
-          continue;
-        }
-
-        overriddenComponents = left.shorthand ?
-          left.components:
-          [left];
-
-        for (k = overriddenComponents.length - 1; k >= 0; k--) {
-          overriddenComponent = overriddenComponents[k];
-          overridingComponent = findComponentIn(right, overriddenComponent);
-          mayOverride = compactable[overriddenComponent.name].canOverride;
-
-          if (!everyValuesPair(mayOverride.bind(null, validator), left, overridingComponent)) {
-            continue traverseLoop;
-          }
-        }
-
-        left.unused = true;
-      } else if (withMerging && left.shorthand && !right.shorthand && isComponentOf(left, right, true)) {
-        // maybe `right` can be pulled into `left` which is a shorthand?
-        if (right.important && !left.important)
-          continue;
-
-        if (!right.important && left.important) {
-          right.unused = true;
-          continue;
-        }
-
-        // Pending more clever algorithm in #527
-        if (moreSameShorthands(properties, i - 1, left.name))
-          continue;
-
-        if (overridingFunction(left, validator))
-          continue;
-
-        if (!isMergeableShorthand(left))
-          continue;
-
-        component = findComponentIn(left, right);
-        if (everyValuesPair(mayOverride.bind(null, validator), component, right)) {
-          var disabledBackgroundMerging =
-            !compatibility.properties.backgroundClipMerging && component.name.indexOf('background-clip') > -1 ||
-            !compatibility.properties.backgroundOriginMerging && component.name.indexOf('background-origin') > -1 ||
-            !compatibility.properties.backgroundSizeMerging && component.name.indexOf('background-size') > -1;
-          var nonMergeableValue = compactable[right.name].nonMergeableValue === right.value[0][1];
-
-          if (disabledBackgroundMerging || nonMergeableValue)
-            continue;
-
-          if (!compatibility.properties.merging && wouldBreakCompatibility(left, validator))
-            continue;
-
-          if (component.value[0][1] != right.value[0][1] && (hasInherit(left) || hasInherit(right)))
-            continue;
-
-          if (wouldResultInLongerValue(left, right))
-            continue;
-
-          if (!left.multiplex && right.multiplex)
-            turnIntoMultiplex(left, multiplexSize(right));
-
-          override(component, right);
-          left.dirty = true;
-        }
-      } else if (withMerging && left.shorthand && right.shorthand && left.name == right.name) {
-        // merge if all components can be merged
-
-        if (!left.multiplex && right.multiplex)
-          continue;
-
-        if (!right.important && left.important) {
-          right.unused = true;
-          continue propertyLoop;
-        }
-
-        if (right.important && !left.important) {
-          left.unused = true;
-          continue;
-        }
-
-        if (!isMergeableShorthand(right)) {
-          left.unused = true;
-          continue;
-        }
-
-        for (k = left.components.length - 1; k >= 0; k--) {
-          var leftComponent = left.components[k];
-          var rightComponent = right.components[k];
-
-          mayOverride = compactable[leftComponent.name].canOverride;
-          if (!everyValuesPair(mayOverride.bind(null, validator), leftComponent, rightComponent))
-            continue propertyLoop;
-        }
-
-        overrideShorthand(left, right);
-        left.dirty = true;
-      } else if (withMerging && left.shorthand && right.shorthand && isComponentOf(left, right)) {
-        // border is a shorthand but any of its components is a shorthand too
-
-        if (!left.important && right.important)
-          continue;
-
-        component = findComponentIn(left, right);
-        mayOverride = compactable[right.name].canOverride;
-        if (!everyValuesPair(mayOverride.bind(null, validator), component, right))
-          continue;
-
-        if (left.important && !right.important) {
-          right.unused = true;
-          continue;
-        }
-
-        var rightRestored = compactable[right.name].restore(right, compactable);
-        if (rightRestored.length > 1)
-          continue;
-
-        component = findComponentIn(left, right);
-        override(component, right);
-        right.dirty = true;
-      } else if (left.name == right.name) {
-        // two non-shorthands should be merged based on understandability
-        overridable = true;
-
-        if (right.shorthand) {
-          for (k = right.components.length - 1; k >= 0 && overridable; k--) {
-            overriddenComponent = left.components[k];
-            overridingComponent = right.components[k];
-            mayOverride = compactable[overridingComponent.name].canOverride;
-
-            overridable = overridable && everyValuesPair(mayOverride.bind(null, validator), overriddenComponent, overridingComponent);
-          }
-        } else {
-          mayOverride = compactable[right.name].canOverride;
-          overridable = everyValuesPair(mayOverride.bind(null, validator), left, right);
-        }
-
-        if (left.important && !right.important && overridable) {
-          right.unused = true;
-          continue;
-        }
-
-        if (!left.important && right.important && overridable) {
-          left.unused = true;
-          continue;
-        }
-
-        if (!overridable) {
-          continue;
-        }
-
-        left.unused = true;
-      }
-    }
-  }
-}
-
-module.exports = overrideProperties;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/properties/overrides-non-component-shorthand.js b/node_modules/clean-css/lib/optimizer/level-2/properties/overrides-non-component-shorthand.js
deleted file mode 100644
index c385218a9..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/properties/overrides-non-component-shorthand.js
+++ /dev/null
@@ -1,9 +0,0 @@
-var compactable = require('../compactable');
-
-function overridesNonComponentShorthand(property1, property2) {
-  return property1.name in compactable &&
-    'overridesShorthands' in compactable[property1.name] &&
-    compactable[property1.name].overridesShorthands.indexOf(property2.name) > -1;
-}
-
-module.exports = overridesNonComponentShorthand;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/properties/populate-components.js b/node_modules/clean-css/lib/optimizer/level-2/properties/populate-components.js
deleted file mode 100644
index c587e83c4..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/properties/populate-components.js
+++ /dev/null
@@ -1,42 +0,0 @@
-var compactable = require('../compactable');
-var InvalidPropertyError = require('../invalid-property-error');
-
-function populateComponents(properties, validator, warnings) {
-  var component;
-  var j, m;
-
-  for (var i = properties.length - 1; i >= 0; i--) {
-    var property = properties[i];
-    var descriptor = compactable[property.name];
-
-    if (descriptor && descriptor.shorthand) {
-      property.shorthand = true;
-      property.dirty = true;
-
-      try {
-        property.components = descriptor.breakUp(property, compactable, validator);
-
-        if (descriptor.shorthandComponents) {
-          for (j = 0, m = property.components.length; j < m; j++) {
-            component = property.components[j];
-            component.components = compactable[component.name].breakUp(component, compactable, validator);
-          }
-        }
-      } catch (e) {
-        if (e instanceof InvalidPropertyError) {
-          property.components = []; // this will set property.unused to true below
-          warnings.push(e.message);
-        } else {
-          throw e;
-        }
-      }
-
-      if (property.components.length > 0)
-        property.multiplex = property.components[0].multiplex;
-      else
-        property.unused = true;
-    }
-  }
-}
-
-module.exports = populateComponents;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/properties/understandable.js b/node_modules/clean-css/lib/optimizer/level-2/properties/understandable.js
deleted file mode 100644
index 032169a24..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/properties/understandable.js
+++ /dev/null
@@ -1,15 +0,0 @@
-var sameVendorPrefixes = require('./vendor-prefixes').same;
-
-function understandable(validator, value1, value2, _position, isPaired) {
-  if (!sameVendorPrefixes(value1, value2)) {
-    return false;
-  }
-
-  if (isPaired && validator.isVariable(value1) !== validator.isVariable(value2)) {
-    return false;
-  }
-
-  return true;
-}
-
-module.exports = understandable;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/properties/vendor-prefixes.js b/node_modules/clean-css/lib/optimizer/level-2/properties/vendor-prefixes.js
deleted file mode 100644
index f9ab52728..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/properties/vendor-prefixes.js
+++ /dev/null
@@ -1,23 +0,0 @@
-var VENDOR_PREFIX_PATTERN = /(?:^|\W)(\-\w+\-)/g;
-
-function unique(value) {
-  var prefixes = [];
-  var match;
-
-  while ((match = VENDOR_PREFIX_PATTERN.exec(value)) !== null) {
-    if (prefixes.indexOf(match[0]) == -1) {
-      prefixes.push(match[0]);
-    }
-  }
-
-  return prefixes;
-}
-
-function same(value1, value2) {
-  return unique(value1).sort().join(',') == unique(value2).sort().join(',');
-}
-
-module.exports = {
-  unique: unique,
-  same: same
-};
diff --git a/node_modules/clean-css/lib/optimizer/level-2/reduce-non-adjacent.js b/node_modules/clean-css/lib/optimizer/level-2/reduce-non-adjacent.js
deleted file mode 100644
index 6ce0902b9..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/reduce-non-adjacent.js
+++ /dev/null
@@ -1,180 +0,0 @@
-var isMergeable = require('./is-mergeable');
-
-var optimizeProperties = require('./properties/optimize');
-
-var cloneArray = require('../../utils/clone-array');
-
-var Token = require('../../tokenizer/token');
-
-var serializeBody = require('../../writer/one-time').body;
-var serializeRules = require('../../writer/one-time').rules;
-
-function reduceNonAdjacent(tokens, context) {
-  var options = context.options;
-  var mergeablePseudoClasses = options.compatibility.selectors.mergeablePseudoClasses;
-  var mergeablePseudoElements = options.compatibility.selectors.mergeablePseudoElements;
-  var multiplePseudoMerging = options.compatibility.selectors.multiplePseudoMerging;
-  var candidates = {};
-  var repeated = [];
-
-  for (var i = tokens.length - 1; i >= 0; i--) {
-    var token = tokens[i];
-
-    if (token[0] != Token.RULE) {
-      continue;
-    } else if (token[2].length === 0) {
-      continue;
-    }
-
-    var selectorAsString = serializeRules(token[1]);
-    var isComplexAndNotSpecial = token[1].length > 1 &&
-      isMergeable(selectorAsString, mergeablePseudoClasses, mergeablePseudoElements, multiplePseudoMerging);
-    var wrappedSelectors = wrappedSelectorsFrom(token[1]);
-    var selectors = isComplexAndNotSpecial ?
-      [selectorAsString].concat(wrappedSelectors) :
-      [selectorAsString];
-
-    for (var j = 0, m = selectors.length; j < m; j++) {
-      var selector = selectors[j];
-
-      if (!candidates[selector])
-        candidates[selector] = [];
-      else
-        repeated.push(selector);
-
-      candidates[selector].push({
-        where: i,
-        list: wrappedSelectors,
-        isPartial: isComplexAndNotSpecial && j > 0,
-        isComplex: isComplexAndNotSpecial && j === 0
-      });
-    }
-  }
-
-  reduceSimpleNonAdjacentCases(tokens, repeated, candidates, options, context);
-  reduceComplexNonAdjacentCases(tokens, candidates, options, context);
-}
-
-function wrappedSelectorsFrom(list) {
-  var wrapped = [];
-
-  for (var i = 0; i < list.length; i++) {
-    wrapped.push([list[i][1]]);
-  }
-
-  return wrapped;
-}
-
-function reduceSimpleNonAdjacentCases(tokens, repeated, candidates, options, context) {
-  function filterOut(idx, bodies) {
-    return data[idx].isPartial && bodies.length === 0;
-  }
-
-  function reduceBody(token, newBody, processedCount, tokenIdx) {
-    if (!data[processedCount - tokenIdx - 1].isPartial)
-      token[2] = newBody;
-  }
-
-  for (var i = 0, l = repeated.length; i < l; i++) {
-    var selector = repeated[i];
-    var data = candidates[selector];
-
-    reduceSelector(tokens, data, {
-      filterOut: filterOut,
-      callback: reduceBody
-    }, options, context);
-  }
-}
-
-function reduceComplexNonAdjacentCases(tokens, candidates, options, context) {
-  var mergeablePseudoClasses = options.compatibility.selectors.mergeablePseudoClasses;
-  var mergeablePseudoElements = options.compatibility.selectors.mergeablePseudoElements;
-  var multiplePseudoMerging = options.compatibility.selectors.multiplePseudoMerging;
-  var localContext = {};
-
-  function filterOut(idx) {
-    return localContext.data[idx].where < localContext.intoPosition;
-  }
-
-  function collectReducedBodies(token, newBody, processedCount, tokenIdx) {
-    if (tokenIdx === 0)
-      localContext.reducedBodies.push(newBody);
-  }
-
-  allSelectors:
-  for (var complexSelector in candidates) {
-    var into = candidates[complexSelector];
-    if (!into[0].isComplex)
-      continue;
-
-    var intoPosition = into[into.length - 1].where;
-    var intoToken = tokens[intoPosition];
-    var reducedBodies = [];
-
-    var selectors = isMergeable(complexSelector, mergeablePseudoClasses, mergeablePseudoElements, multiplePseudoMerging) ?
-      into[0].list :
-      [complexSelector];
-
-    localContext.intoPosition = intoPosition;
-    localContext.reducedBodies = reducedBodies;
-
-    for (var j = 0, m = selectors.length; j < m; j++) {
-      var selector = selectors[j];
-      var data = candidates[selector];
-
-      if (data.length < 2)
-        continue allSelectors;
-
-      localContext.data = data;
-
-      reduceSelector(tokens, data, {
-        filterOut: filterOut,
-        callback: collectReducedBodies
-      }, options, context);
-
-      if (serializeBody(reducedBodies[reducedBodies.length - 1]) != serializeBody(reducedBodies[0]))
-        continue allSelectors;
-    }
-
-    intoToken[2] = reducedBodies[0];
-  }
-}
-
-function reduceSelector(tokens, data, context, options, outerContext) {
-  var bodies = [];
-  var bodiesAsList = [];
-  var processedTokens = [];
-
-  for (var j = data.length - 1; j >= 0; j--) {
-    if (context.filterOut(j, bodies))
-      continue;
-
-    var where = data[j].where;
-    var token = tokens[where];
-    var clonedBody = cloneArray(token[2]);
-
-    bodies = bodies.concat(clonedBody);
-    bodiesAsList.push(clonedBody);
-    processedTokens.push(where);
-  }
-
-  optimizeProperties(bodies, true, false, outerContext);
-
-  var processedCount = processedTokens.length;
-  var propertyIdx = bodies.length - 1;
-  var tokenIdx = processedCount - 1;
-
-  while (tokenIdx >= 0) {
-     if ((tokenIdx === 0 || (bodies[propertyIdx] && bodiesAsList[tokenIdx].indexOf(bodies[propertyIdx]) > -1)) && propertyIdx > -1) {
-      propertyIdx--;
-      continue;
-    }
-
-    var newBody = bodies.splice(propertyIdx + 1);
-    context.callback(tokens[processedTokens[tokenIdx]], newBody, processedCount, tokenIdx);
-
-    tokenIdx--;
-  }
-}
-
-module.exports = reduceNonAdjacent;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/remove-duplicate-font-at-rules.js b/node_modules/clean-css/lib/optimizer/level-2/remove-duplicate-font-at-rules.js
deleted file mode 100644
index bc85d5d67..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/remove-duplicate-font-at-rules.js
+++ /dev/null
@@ -1,30 +0,0 @@
-var Token = require('../../tokenizer/token');
-
-var serializeAll = require('../../writer/one-time').all;
-
-var FONT_FACE_SCOPE = '@font-face';
-
-function removeDuplicateFontAtRules(tokens) {
-  var fontAtRules = [];
-  var token;
-  var key;
-  var i, l;
-
-  for (i = 0, l = tokens.length; i < l; i++) {
-    token = tokens[i];
-
-    if (token[0] != Token.AT_RULE_BLOCK && token[1][0][1] != FONT_FACE_SCOPE) {
-      continue;
-    }
-
-    key = serializeAll([token]);
-
-    if (fontAtRules.indexOf(key) > -1) {
-      token[2] = [];
-    } else {
-      fontAtRules.push(key);
-    }
-  }
-}
-
-module.exports = removeDuplicateFontAtRules;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/remove-duplicate-media-queries.js b/node_modules/clean-css/lib/optimizer/level-2/remove-duplicate-media-queries.js
deleted file mode 100644
index 2c8f31d9d..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/remove-duplicate-media-queries.js
+++ /dev/null
@@ -1,30 +0,0 @@
-var Token = require('../../tokenizer/token');
-
-var serializeAll = require('../../writer/one-time').all;
-var serializeRules = require('../../writer/one-time').rules;
-
-function removeDuplicateMediaQueries(tokens) {
-  var candidates = {};
-  var candidate;
-  var token;
-  var key;
-  var i, l;
-
-  for (i = 0, l = tokens.length; i < l; i++) {
-    token = tokens[i];
-    if (token[0] != Token.NESTED_BLOCK) {
-      continue;
-    }
-
-    key = serializeRules(token[1]) + '%' + serializeAll(token[2]);
-    candidate = candidates[key];
-
-    if (candidate) {
-      candidate[2] = [];
-    }
-
-    candidates[key] = token;
-  }
-}
-
-module.exports = removeDuplicateMediaQueries;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/remove-duplicates.js b/node_modules/clean-css/lib/optimizer/level-2/remove-duplicates.js
deleted file mode 100644
index 9aa6ace93..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/remove-duplicates.js
+++ /dev/null
@@ -1,43 +0,0 @@
-var Token = require('../../tokenizer/token');
-
-var serializeBody = require('../../writer/one-time').body;
-var serializeRules = require('../../writer/one-time').rules;
-
-function removeDuplicates(tokens) {
-  var matched = {};
-  var moreThanOnce = [];
-  var id, token;
-  var body, bodies;
-
-  for (var i = 0, l = tokens.length; i < l; i++) {
-    token = tokens[i];
-    if (token[0] != Token.RULE)
-      continue;
-
-    id = serializeRules(token[1]);
-
-    if (matched[id] && matched[id].length == 1)
-      moreThanOnce.push(id);
-    else
-      matched[id] = matched[id] || [];
-
-    matched[id].push(i);
-  }
-
-  for (i = 0, l = moreThanOnce.length; i < l; i++) {
-    id = moreThanOnce[i];
-    bodies = [];
-
-    for (var j = matched[id].length - 1; j >= 0; j--) {
-      token = tokens[matched[id][j]];
-      body = serializeBody(token[2]);
-
-      if (bodies.indexOf(body) > -1)
-        token[2] = [];
-      else
-        bodies.push(body);
-    }
-  }
-}
-
-module.exports = removeDuplicates;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/remove-unused-at-rules.js b/node_modules/clean-css/lib/optimizer/level-2/remove-unused-at-rules.js
deleted file mode 100644
index 798d3939f..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/remove-unused-at-rules.js
+++ /dev/null
@@ -1,249 +0,0 @@
-var populateComponents = require('./properties/populate-components');
-
-var wrapForOptimizing = require('../wrap-for-optimizing').single;
-var restoreFromOptimizing = require('../restore-from-optimizing');
-
-var Token = require('../../tokenizer/token');
-
-var animationNameRegex = /^(\-moz\-|\-o\-|\-webkit\-)?animation-name$/;
-var animationRegex = /^(\-moz\-|\-o\-|\-webkit\-)?animation$/;
-var keyframeRegex = /^@(\-moz\-|\-o\-|\-webkit\-)?keyframes /;
-var importantRegex = /\s{0,31}!important$/;
-var optionalMatchingQuotesRegex = /^(['"]?)(.*)\1$/;
-
-function normalize(value) {
-  return value
-    .replace(optionalMatchingQuotesRegex, '$2')
-    .replace(importantRegex, '');
-}
-
-function removeUnusedAtRules(tokens, context) {
-  removeUnusedAtRule(tokens, matchCounterStyle, markCounterStylesAsUsed, context);
-  removeUnusedAtRule(tokens, matchFontFace, markFontFacesAsUsed, context);
-  removeUnusedAtRule(tokens, matchKeyframe, markKeyframesAsUsed, context);
-  removeUnusedAtRule(tokens, matchNamespace, markNamespacesAsUsed, context);
-}
-
-function removeUnusedAtRule(tokens, matchCallback, markCallback, context) {
-  var atRules = {};
-  var atRule;
-  var atRuleTokens;
-  var atRuleToken;
-  var zeroAt;
-  var i, l;
-
-  for (i = 0, l = tokens.length; i < l; i++) {
-    matchCallback(tokens[i], atRules);
-  }
-
-  if (Object.keys(atRules).length === 0) {
-    return;
-  }
-
-  markUsedAtRules(tokens, markCallback, atRules, context);
-
-  for (atRule in atRules) {
-    atRuleTokens = atRules[atRule];
-
-    for (i = 0, l = atRuleTokens.length; i < l; i++) {
-      atRuleToken = atRuleTokens[i];
-      zeroAt = atRuleToken[0] == Token.AT_RULE ? 1 : 2;
-      atRuleToken[zeroAt] = [];
-    }
-  }
-}
-
-function markUsedAtRules(tokens, markCallback, atRules, context) {
-  var boundMarkCallback = markCallback(atRules);
-  var i, l;
-
-  for (i = 0, l = tokens.length; i < l; i++) {
-    switch (tokens[i][0]) {
-      case Token.RULE:
-        boundMarkCallback(tokens[i], context);
-        break;
-      case Token.NESTED_BLOCK:
-        markUsedAtRules(tokens[i][2], markCallback, atRules, context);
-    }
-  }
-}
-
-function matchCounterStyle(token, atRules) {
-  var match;
-
-  if (token[0] == Token.AT_RULE_BLOCK && token[1][0][1].indexOf('@counter-style') === 0) {
-    match = token[1][0][1].split(' ')[1];
-    atRules[match] = atRules[match] || [];
-    atRules[match].push(token);
-  }
-}
-
-function markCounterStylesAsUsed(atRules) {
-  return function (token, context) {
-    var property;
-    var wrappedProperty;
-    var i, l;
-
-    for (i = 0, l = token[2].length; i < l; i++) {
-      property = token[2][i];
-
-      if (property[1][1] == 'list-style') {
-        wrappedProperty = wrapForOptimizing(property);
-        populateComponents([wrappedProperty], context.validator, context.warnings);
-
-        if (wrappedProperty.components[0].value[0][1] in atRules) {
-          delete atRules[property[2][1]];
-        }
-
-        restoreFromOptimizing([wrappedProperty]);
-      }
-
-      if (property[1][1] == 'list-style-type' && property[2][1] in atRules) {
-        delete atRules[property[2][1]];
-      }
-    }
-  };
-}
-
-function matchFontFace(token, atRules) {
-  var property;
-  var match;
-  var i, l;
-
-  if (token[0] == Token.AT_RULE_BLOCK && token[1][0][1] == '@font-face') {
-    for (i = 0, l = token[2].length; i < l; i++) {
-      property = token[2][i];
-
-      if (property[1][1] == 'font-family') {
-        match = normalize(property[2][1].toLowerCase());
-        atRules[match] = atRules[match] || [];
-        atRules[match].push(token);
-        break;
-      }
-    }
-  }
-}
-
-function markFontFacesAsUsed(atRules) {
-  return function (token, context) {
-    var property;
-    var wrappedProperty;
-    var component;
-    var normalizedMatch;
-    var i, l;
-    var j, m;
-
-    for (i = 0, l = token[2].length; i < l; i++) {
-      property = token[2][i];
-
-      if (property[1][1] == 'font') {
-        wrappedProperty = wrapForOptimizing(property);
-        populateComponents([wrappedProperty], context.validator, context.warnings);
-        component = wrappedProperty.components[6];
-
-        for (j = 0, m = component.value.length; j < m; j++) {
-          normalizedMatch = normalize(component.value[j][1].toLowerCase());
-
-          if (normalizedMatch in atRules) {
-            delete atRules[normalizedMatch];
-          }
-        }
-
-        restoreFromOptimizing([wrappedProperty]);
-      }
-
-      if (property[1][1] == 'font-family') {
-        for (j = 2, m = property.length; j < m; j++) {
-          normalizedMatch = normalize(property[j][1].toLowerCase());
-
-          if (normalizedMatch in atRules) {
-            delete atRules[normalizedMatch];
-          }
-        }
-      }
-    }
-  };
-}
-
-function matchKeyframe(token, atRules) {
-  var match;
-
-  if (token[0] == Token.NESTED_BLOCK && keyframeRegex.test(token[1][0][1])) {
-    match = token[1][0][1].split(' ')[1];
-    atRules[match] = atRules[match] || [];
-    atRules[match].push(token);
-  }
-}
-
-function markKeyframesAsUsed(atRules) {
-  return function (token, context) {
-    var property;
-    var wrappedProperty;
-    var component;
-    var i, l;
-    var j, m;
-
-    for (i = 0, l = token[2].length; i < l; i++) {
-      property = token[2][i];
-
-      if (animationRegex.test(property[1][1])) {
-        wrappedProperty = wrapForOptimizing(property);
-        populateComponents([wrappedProperty], context.validator, context.warnings);
-        component = wrappedProperty.components[7];
-
-        for (j = 0, m = component.value.length; j < m; j++) {
-          if (component.value[j][1] in atRules) {
-            delete atRules[component.value[j][1]];
-          }
-        }
-
-        restoreFromOptimizing([wrappedProperty]);
-      }
-
-      if (animationNameRegex.test(property[1][1])) {
-        for (j = 2, m = property.length; j < m; j++) {
-          if (property[j][1] in atRules) {
-            delete atRules[property[j][1]];
-          }
-        }
-      }
-    }
-  };
-}
-
-function matchNamespace(token, atRules) {
-  var match;
-
-  if (token[0] == Token.AT_RULE && token[1].indexOf('@namespace') === 0) {
-    match = token[1].split(' ')[1];
-    atRules[match] = atRules[match] || [];
-    atRules[match].push(token);
-  }
-}
-
-function markNamespacesAsUsed(atRules) {
-  var namespaceRegex = new RegExp(Object.keys(atRules).join('\\\||') + '\\\|', 'g');
-
-  return function (token) {
-    var match;
-    var scope;
-    var normalizedMatch;
-    var i, l;
-    var j, m;
-
-    for (i = 0, l = token[1].length; i < l; i++) {
-      scope = token[1][i];
-      match = scope[1].match(namespaceRegex);
-
-      for (j = 0, m = match.length; j < m; j++) {
-        normalizedMatch = match[j].substring(0, match[j].length - 1);
-
-        if (normalizedMatch in atRules) {
-          delete atRules[normalizedMatch];
-        }
-      }
-    }
-  };
-}
-
-module.exports = removeUnusedAtRules;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/reorderable.js b/node_modules/clean-css/lib/optimizer/level-2/reorderable.js
deleted file mode 100644
index 4a3747a08..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/reorderable.js
+++ /dev/null
@@ -1,93 +0,0 @@
-// TODO: it'd be great to merge it with the other canReorder functionality
-
-var rulesOverlap = require('./rules-overlap');
-var specificitiesOverlap = require('./specificities-overlap');
-
-var FLEX_PROPERTIES = /align\-items|box\-align|box\-pack|flex|justify/;
-var BORDER_PROPERTIES = /^border\-(top|right|bottom|left|color|style|width|radius)/;
-
-function canReorder(left, right, cache) {
-  for (var i = right.length - 1; i >= 0; i--) {
-    for (var j = left.length - 1; j >= 0; j--) {
-      if (!canReorderSingle(left[j], right[i], cache))
-        return false;
-    }
-  }
-
-  return true;
-}
-
-function canReorderSingle(left, right, cache) {
-  var leftName = left[0];
-  var leftValue = left[1];
-  var leftNameRoot = left[2];
-  var leftSelector = left[5];
-  var leftInSpecificSelector = left[6];
-  var rightName = right[0];
-  var rightValue = right[1];
-  var rightNameRoot = right[2];
-  var rightSelector = right[5];
-  var rightInSpecificSelector = right[6];
-
-  if (leftName == 'font' && rightName == 'line-height' || rightName == 'font' && leftName == 'line-height')
-    return false;
-  if (FLEX_PROPERTIES.test(leftName) && FLEX_PROPERTIES.test(rightName))
-    return false;
-  if (leftNameRoot == rightNameRoot && unprefixed(leftName) == unprefixed(rightName) && (vendorPrefixed(leftName) ^ vendorPrefixed(rightName)))
-    return false;
-  if (leftNameRoot == 'border' && BORDER_PROPERTIES.test(rightNameRoot) && (leftName == 'border' || leftName == rightNameRoot || (leftValue != rightValue && sameBorderComponent(leftName, rightName))))
-    return false;
-  if (rightNameRoot == 'border' && BORDER_PROPERTIES.test(leftNameRoot) && (rightName == 'border' || rightName == leftNameRoot || (leftValue != rightValue && sameBorderComponent(leftName, rightName))))
-    return false;
-  if (leftNameRoot == 'border' && rightNameRoot == 'border' && leftName != rightName && (isSideBorder(leftName) && isStyleBorder(rightName) || isStyleBorder(leftName) && isSideBorder(rightName)))
-    return false;
-  if (leftNameRoot != rightNameRoot)
-    return true;
-  if (leftName == rightName && leftNameRoot == rightNameRoot && (leftValue == rightValue || withDifferentVendorPrefix(leftValue, rightValue)))
-    return true;
-  if (leftName != rightName && leftNameRoot == rightNameRoot && leftName != leftNameRoot && rightName != rightNameRoot)
-    return true;
-  if (leftName != rightName && leftNameRoot == rightNameRoot && leftValue == rightValue)
-    return true;
-  if (rightInSpecificSelector && leftInSpecificSelector && !inheritable(leftNameRoot) && !inheritable(rightNameRoot) && !rulesOverlap(rightSelector, leftSelector, false))
-    return true;
-  if (!specificitiesOverlap(leftSelector, rightSelector, cache))
-    return true;
-
-  return false;
-}
-
-function vendorPrefixed(name) {
-  return /^\-(?:moz|webkit|ms|o)\-/.test(name);
-}
-
-function unprefixed(name) {
-  return name.replace(/^\-(?:moz|webkit|ms|o)\-/, '');
-}
-
-function sameBorderComponent(name1, name2) {
-  return name1.split('-').pop() == name2.split('-').pop();
-}
-
-function isSideBorder(name) {
-  return name == 'border-top' || name == 'border-right' || name == 'border-bottom' || name == 'border-left';
-}
-
-function isStyleBorder(name) {
-  return name == 'border-color' || name == 'border-style' || name == 'border-width';
-}
-
-function withDifferentVendorPrefix(value1, value2) {
-  return vendorPrefixed(value1) && vendorPrefixed(value2) && value1.split('-')[1] != value2.split('-')[2];
-}
-
-function inheritable(name) {
-  // According to http://www.w3.org/TR/CSS21/propidx.html
-  // Others will be catched by other, preceeding rules
-  return name == 'font' || name == 'line-height' || name == 'list-style';
-}
-
-module.exports = {
-  canReorder: canReorder,
-  canReorderSingle: canReorderSingle
-};
diff --git a/node_modules/clean-css/lib/optimizer/level-2/restore-with-components.js b/node_modules/clean-css/lib/optimizer/level-2/restore-with-components.js
deleted file mode 100644
index caf7c4c94..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/restore-with-components.js
+++ /dev/null
@@ -1,13 +0,0 @@
-var compactable = require('./compactable');
-
-function restoreWithComponents(property) {
-  var descriptor = compactable[property.name];
-
-  if (descriptor && descriptor.shorthand) {
-    return descriptor.restore(property, compactable);
-  } else {
-    return property.value;
-  }
-}
-
-module.exports = restoreWithComponents;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/restore.js b/node_modules/clean-css/lib/optimizer/level-2/restore.js
deleted file mode 100644
index f9c2f0d33..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/restore.js
+++ /dev/null
@@ -1,303 +0,0 @@
-var shallowClone = require('./clone').shallow;
-
-var Token = require('../../tokenizer/token');
-var Marker = require('../../tokenizer/marker');
-
-function isInheritOnly(values) {
-  for (var i = 0, l = values.length; i < l; i++) {
-    var value = values[i][1];
-
-    if (value != 'inherit' && value != Marker.COMMA && value != Marker.FORWARD_SLASH)
-      return false;
-  }
-
-  return true;
-}
-
-function background(property, compactable, lastInMultiplex) {
-  var components = property.components;
-  var restored = [];
-  var needsOne, needsBoth;
-
-  function restoreValue(component) {
-    Array.prototype.unshift.apply(restored, component.value);
-  }
-
-  function isDefaultValue(component) {
-    var descriptor = compactable[component.name];
-
-    if (descriptor.doubleValues && descriptor.defaultValue.length == 1) {
-      return component.value[0][1] == descriptor.defaultValue[0] && (component.value[1] ? component.value[1][1] == descriptor.defaultValue[0] : true);
-    } else if (descriptor.doubleValues && descriptor.defaultValue.length != 1) {
-      return component.value[0][1] == descriptor.defaultValue[0] && (component.value[1] ? component.value[1][1] : component.value[0][1]) == descriptor.defaultValue[1];
-    } else {
-      return component.value[0][1] == descriptor.defaultValue;
-    }
-  }
-
-  for (var i = components.length - 1; i >= 0; i--) {
-    var component = components[i];
-    var isDefault = isDefaultValue(component);
-
-    if (component.name == 'background-clip') {
-      var originComponent = components[i - 1];
-      var isOriginDefault = isDefaultValue(originComponent);
-
-      needsOne = component.value[0][1] == originComponent.value[0][1];
-
-      needsBoth = !needsOne && (
-        (isOriginDefault && !isDefault) ||
-        (!isOriginDefault && !isDefault) ||
-        (!isOriginDefault && isDefault && component.value[0][1] != originComponent.value[0][1]));
-
-      if (needsOne) {
-        restoreValue(originComponent);
-      } else if (needsBoth) {
-        restoreValue(component);
-        restoreValue(originComponent);
-      }
-
-      i--;
-    } else if (component.name == 'background-size') {
-      var positionComponent = components[i - 1];
-      var isPositionDefault = isDefaultValue(positionComponent);
-
-      needsOne = !isPositionDefault && isDefault;
-
-      needsBoth = !needsOne &&
-        (isPositionDefault && !isDefault || !isPositionDefault && !isDefault);
-
-      if (needsOne) {
-        restoreValue(positionComponent);
-      } else if (needsBoth) {
-        restoreValue(component);
-        restored.unshift([Token.PROPERTY_VALUE, Marker.FORWARD_SLASH]);
-        restoreValue(positionComponent);
-      } else if (positionComponent.value.length == 1) {
-        restoreValue(positionComponent);
-      }
-
-      i--;
-    } else {
-      if (isDefault || compactable[component.name].multiplexLastOnly && !lastInMultiplex)
-        continue;
-
-      restoreValue(component);
-    }
-  }
-
-  if (restored.length === 0 && property.value.length == 1 && property.value[0][1] == '0')
-    restored.push(property.value[0]);
-
-  if (restored.length === 0)
-    restored.push([Token.PROPERTY_VALUE, compactable[property.name].defaultValue]);
-
-  if (isInheritOnly(restored))
-    return [restored[0]];
-
-  return restored;
-}
-
-function borderRadius(property, compactable) {
-  if (property.multiplex) {
-    var horizontal = shallowClone(property);
-    var vertical = shallowClone(property);
-
-    for (var i = 0; i < 4; i++) {
-      var component = property.components[i];
-
-      var horizontalComponent = shallowClone(property);
-      horizontalComponent.value = [component.value[0]];
-      horizontal.components.push(horizontalComponent);
-
-      var verticalComponent = shallowClone(property);
-      // FIXME: only shorthand compactor (see breakup#borderRadius) knows that border radius
-      // longhands have two values, whereas tokenizer does not care about populating 2nd value
-      // if it's missing, hence this fallback
-      verticalComponent.value = [component.value[1] || component.value[0]];
-      vertical.components.push(verticalComponent);
-    }
-
-    var horizontalValues = fourValues(horizontal, compactable);
-    var verticalValues = fourValues(vertical, compactable);
-
-    if (horizontalValues.length == verticalValues.length &&
-        horizontalValues[0][1] == verticalValues[0][1] &&
-        (horizontalValues.length > 1 ? horizontalValues[1][1] == verticalValues[1][1] : true) &&
-        (horizontalValues.length > 2 ? horizontalValues[2][1] == verticalValues[2][1] : true) &&
-        (horizontalValues.length > 3 ? horizontalValues[3][1] == verticalValues[3][1] : true)) {
-      return horizontalValues;
-    } else {
-      return horizontalValues.concat([[Token.PROPERTY_VALUE, Marker.FORWARD_SLASH]]).concat(verticalValues);
-    }
-  } else {
-    return fourValues(property, compactable);
-  }
-}
-
-function font(property, compactable) {
-  var components = property.components;
-  var restored = [];
-  var component;
-  var componentIndex = 0;
-  var fontFamilyIndex = 0;
-
-  if (property.value[0][1].indexOf(Marker.INTERNAL) === 0) {
-    property.value[0][1] = property.value[0][1].substring(Marker.INTERNAL.length);
-    return property.value;
-  }
-
-  // first four components are optional
-  while (componentIndex < 4) {
-    component = components[componentIndex];
-
-    if (component.value[0][1] != compactable[component.name].defaultValue) {
-      Array.prototype.push.apply(restored, component.value);
-    }
-
-    componentIndex++;
-  }
-
-  // then comes font-size
-  Array.prototype.push.apply(restored, components[componentIndex].value);
-  componentIndex++;
-
-  // then may come line-height
-  if (components[componentIndex].value[0][1] != compactable[components[componentIndex].name].defaultValue) {
-    Array.prototype.push.apply(restored, [[Token.PROPERTY_VALUE, Marker.FORWARD_SLASH]]);
-    Array.prototype.push.apply(restored, components[componentIndex].value);
-  }
-
-  componentIndex++;
-
-  // then comes font-family
-  while (components[componentIndex].value[fontFamilyIndex]) {
-    restored.push(components[componentIndex].value[fontFamilyIndex]);
-
-    if (components[componentIndex].value[fontFamilyIndex + 1]) {
-      restored.push([Token.PROPERTY_VALUE, Marker.COMMA]);
-    }
-
-    fontFamilyIndex++;
-  }
-
-  if (isInheritOnly(restored)) {
-    return [restored[0]];
-  }
-
-  return restored;
-}
-
-function fourValues(property) {
-  var components = property.components;
-  var value1 = components[0].value[0];
-  var value2 = components[1].value[0];
-  var value3 = components[2].value[0];
-  var value4 = components[3].value[0];
-
-  if (value1[1] == value2[1] && value1[1] == value3[1] && value1[1] == value4[1]) {
-    return [value1];
-  } else if (value1[1] == value3[1] && value2[1] == value4[1]) {
-    return [value1, value2];
-  } else if (value2[1] == value4[1]) {
-    return [value1, value2, value3];
-  } else {
-    return [value1, value2, value3, value4];
-  }
-}
-
-function multiplex(restoreWith) {
-  return function (property, compactable) {
-    if (!property.multiplex)
-      return restoreWith(property, compactable, true);
-
-    var multiplexSize = 0;
-    var restored = [];
-    var componentMultiplexSoFar = {};
-    var i, l;
-
-    // At this point we don't know what's the multiplex size, e.g. how many background layers are there
-    for (i = 0, l = property.components[0].value.length; i < l; i++) {
-      if (property.components[0].value[i][1] == Marker.COMMA)
-        multiplexSize++;
-    }
-
-    for (i = 0; i <= multiplexSize; i++) {
-      var _property = shallowClone(property);
-
-      // We split multiplex into parts and restore them one by one
-      for (var j = 0, m = property.components.length; j < m; j++) {
-        var componentToClone = property.components[j];
-        var _component = shallowClone(componentToClone);
-        _property.components.push(_component);
-
-        // The trick is some properties has more than one value, so we iterate over values looking for
-        // a multiplex separator - a comma
-        for (var k = componentMultiplexSoFar[_component.name] || 0, n = componentToClone.value.length; k < n; k++) {
-          if (componentToClone.value[k][1] == Marker.COMMA) {
-            componentMultiplexSoFar[_component.name] = k + 1;
-            break;
-          }
-
-          _component.value.push(componentToClone.value[k]);
-        }
-      }
-
-      // No we can restore shorthand value
-      var lastInMultiplex = i == multiplexSize;
-      var _restored = restoreWith(_property, compactable, lastInMultiplex);
-      Array.prototype.push.apply(restored, _restored);
-
-      if (i < multiplexSize)
-        restored.push([Token.PROPERTY_VALUE, Marker.COMMA]);
-    }
-
-    return restored;
-  };
-}
-
-function withoutDefaults(property, compactable) {
-  var components = property.components;
-  var restored = [];
-
-  for (var i = components.length - 1; i >= 0; i--) {
-    var component = components[i];
-    var descriptor = compactable[component.name];
-
-    if (component.value[0][1] != descriptor.defaultValue || ('keepUnlessDefault' in descriptor) && !isDefault(components, compactable, descriptor.keepUnlessDefault)) {
-      restored.unshift(component.value[0]);
-    }
-  }
-
-  if (restored.length === 0)
-    restored.push([Token.PROPERTY_VALUE, compactable[property.name].defaultValue]);
-
-  if (isInheritOnly(restored))
-    return [restored[0]];
-
-  return restored;
-}
-
-function isDefault(components, compactable, propertyName) {
-  var component;
-  var i, l;
-
-  for (i = 0, l = components.length; i < l; i++) {
-    component = components[i];
-
-    if (component.name == propertyName && component.value[0][1] == compactable[propertyName].defaultValue) {
-      return true;
-    }
-  }
-
-  return false;
-}
-
-module.exports = {
-  background: background,
-  borderRadius: borderRadius,
-  font: font,
-  fourValues: fourValues,
-  multiplex: multiplex,
-  withoutDefaults: withoutDefaults
-};
diff --git a/node_modules/clean-css/lib/optimizer/level-2/restructure.js b/node_modules/clean-css/lib/optimizer/level-2/restructure.js
deleted file mode 100644
index 90b8bfa65..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/restructure.js
+++ /dev/null
@@ -1,389 +0,0 @@
-var canReorderSingle = require('./reorderable').canReorderSingle;
-var extractProperties = require('./extract-properties');
-var isMergeable = require('./is-mergeable');
-var tidyRuleDuplicates = require('./tidy-rule-duplicates');
-
-var Token = require('../../tokenizer/token');
-
-var cloneArray = require('../../utils/clone-array');
-
-var serializeBody = require('../../writer/one-time').body;
-var serializeRules = require('../../writer/one-time').rules;
-
-function naturalSorter(a, b) {
-  return a > b ? 1 : -1;
-}
-
-function cloneAndMergeSelectors(propertyA, propertyB) {
-  var cloned = cloneArray(propertyA);
-  cloned[5] = cloned[5].concat(propertyB[5]);
-
-  return cloned;
-}
-
-function restructure(tokens, context) {
-  var options = context.options;
-  var mergeablePseudoClasses = options.compatibility.selectors.mergeablePseudoClasses;
-  var mergeablePseudoElements = options.compatibility.selectors.mergeablePseudoElements;
-  var mergeLimit = options.compatibility.selectors.mergeLimit;
-  var multiplePseudoMerging = options.compatibility.selectors.multiplePseudoMerging;
-  var specificityCache = context.cache.specificity;
-  var movableTokens = {};
-  var movedProperties = [];
-  var multiPropertyMoveCache = {};
-  var movedToBeDropped = [];
-  var maxCombinationsLevel = 2;
-  var ID_JOIN_CHARACTER = '%';
-
-  function sendToMultiPropertyMoveCache(position, movedProperty, allFits) {
-    for (var i = allFits.length - 1; i >= 0; i--) {
-      var fit = allFits[i][0];
-      var id = addToCache(movedProperty, fit);
-
-      if (multiPropertyMoveCache[id].length > 1 && processMultiPropertyMove(position, multiPropertyMoveCache[id])) {
-        removeAllMatchingFromCache(id);
-        break;
-      }
-    }
-  }
-
-  function addToCache(movedProperty, fit) {
-    var id = cacheId(fit);
-    multiPropertyMoveCache[id] = multiPropertyMoveCache[id] || [];
-    multiPropertyMoveCache[id].push([movedProperty, fit]);
-    return id;
-  }
-
-  function removeAllMatchingFromCache(matchId) {
-    var matchSelectors = matchId.split(ID_JOIN_CHARACTER);
-    var forRemoval = [];
-    var i;
-
-    for (var id in multiPropertyMoveCache) {
-      var selectors = id.split(ID_JOIN_CHARACTER);
-      for (i = selectors.length - 1; i >= 0; i--) {
-        if (matchSelectors.indexOf(selectors[i]) > -1) {
-          forRemoval.push(id);
-          break;
-        }
-      }
-    }
-
-    for (i = forRemoval.length - 1; i >= 0; i--) {
-      delete multiPropertyMoveCache[forRemoval[i]];
-    }
-  }
-
-  function cacheId(cachedTokens) {
-    var id = [];
-    for (var i = 0, l = cachedTokens.length; i < l; i++) {
-      id.push(serializeRules(cachedTokens[i][1]));
-    }
-    return id.join(ID_JOIN_CHARACTER);
-  }
-
-  function tokensToMerge(sourceTokens) {
-    var uniqueTokensWithBody = [];
-    var mergeableTokens = [];
-
-    for (var i = sourceTokens.length - 1; i >= 0; i--) {
-      if (!isMergeable(serializeRules(sourceTokens[i][1]), mergeablePseudoClasses, mergeablePseudoElements, multiplePseudoMerging)) {
-        continue;
-      }
-
-      mergeableTokens.unshift(sourceTokens[i]);
-      if (sourceTokens[i][2].length > 0 && uniqueTokensWithBody.indexOf(sourceTokens[i]) == -1)
-        uniqueTokensWithBody.push(sourceTokens[i]);
-    }
-
-    return uniqueTokensWithBody.length > 1 ?
-      mergeableTokens :
-      [];
-  }
-
-  function shortenIfPossible(position, movedProperty) {
-    var name = movedProperty[0];
-    var value = movedProperty[1];
-    var key = movedProperty[4];
-    var valueSize = name.length + value.length + 1;
-    var allSelectors = [];
-    var qualifiedTokens = [];
-
-    var mergeableTokens = tokensToMerge(movableTokens[key]);
-    if (mergeableTokens.length < 2)
-      return;
-
-    var allFits = findAllFits(mergeableTokens, valueSize, 1);
-    var bestFit = allFits[0];
-    if (bestFit[1] > 0)
-      return sendToMultiPropertyMoveCache(position, movedProperty, allFits);
-
-    for (var i = bestFit[0].length - 1; i >=0; i--) {
-      allSelectors = bestFit[0][i][1].concat(allSelectors);
-      qualifiedTokens.unshift(bestFit[0][i]);
-    }
-
-    allSelectors = tidyRuleDuplicates(allSelectors);
-    dropAsNewTokenAt(position, [movedProperty], allSelectors, qualifiedTokens);
-  }
-
-  function fitSorter(fit1, fit2) {
-    return fit1[1] > fit2[1] ? 1 : (fit1[1] == fit2[1] ? 0 : -1);
-  }
-
-  function findAllFits(mergeableTokens, propertySize, propertiesCount) {
-    var combinations = allCombinations(mergeableTokens, propertySize, propertiesCount, maxCombinationsLevel - 1);
-    return combinations.sort(fitSorter);
-  }
-
-  function allCombinations(tokensVariant, propertySize, propertiesCount, level) {
-    var differenceVariants = [[tokensVariant, sizeDifference(tokensVariant, propertySize, propertiesCount)]];
-    if (tokensVariant.length > 2 && level > 0) {
-      for (var i = tokensVariant.length - 1; i >= 0; i--) {
-        var subVariant = Array.prototype.slice.call(tokensVariant, 0);
-        subVariant.splice(i, 1);
-        differenceVariants = differenceVariants.concat(allCombinations(subVariant, propertySize, propertiesCount, level - 1));
-      }
-    }
-
-    return differenceVariants;
-  }
-
-  function sizeDifference(tokensVariant, propertySize, propertiesCount) {
-    var allSelectorsSize = 0;
-    for (var i = tokensVariant.length - 1; i >= 0; i--) {
-      allSelectorsSize += tokensVariant[i][2].length > propertiesCount ? serializeRules(tokensVariant[i][1]).length : -1;
-    }
-    return allSelectorsSize - (tokensVariant.length - 1) * propertySize + 1;
-  }
-
-  function dropAsNewTokenAt(position, properties, allSelectors, mergeableTokens) {
-    var i, j, k, m;
-    var allProperties = [];
-
-    for (i = mergeableTokens.length - 1; i >= 0; i--) {
-      var mergeableToken = mergeableTokens[i];
-
-      for (j = mergeableToken[2].length - 1; j >= 0; j--) {
-        var mergeableProperty = mergeableToken[2][j];
-
-        for (k = 0, m = properties.length; k < m; k++) {
-          var property = properties[k];
-
-          var mergeablePropertyName = mergeableProperty[1][1];
-          var propertyName = property[0];
-          var propertyBody = property[4];
-          if (mergeablePropertyName == propertyName && serializeBody([mergeableProperty]) == propertyBody) {
-            mergeableToken[2].splice(j, 1);
-            break;
-          }
-        }
-      }
-    }
-
-    for (i = properties.length - 1; i >= 0; i--) {
-      allProperties.unshift(properties[i][3]);
-    }
-
-    var newToken = [Token.RULE, allSelectors, allProperties];
-    tokens.splice(position, 0, newToken);
-  }
-
-  function dropPropertiesAt(position, movedProperty) {
-    var key = movedProperty[4];
-    var toMove = movableTokens[key];
-
-    if (toMove && toMove.length > 1) {
-      if (!shortenMultiMovesIfPossible(position, movedProperty))
-        shortenIfPossible(position, movedProperty);
-    }
-  }
-
-  function shortenMultiMovesIfPossible(position, movedProperty) {
-    var candidates = [];
-    var propertiesAndMergableTokens = [];
-    var key = movedProperty[4];
-    var j, k;
-
-    var mergeableTokens = tokensToMerge(movableTokens[key]);
-    if (mergeableTokens.length < 2)
-      return;
-
-    movableLoop:
-    for (var value in movableTokens) {
-      var tokensList = movableTokens[value];
-
-      for (j = mergeableTokens.length - 1; j >= 0; j--) {
-        if (tokensList.indexOf(mergeableTokens[j]) == -1)
-          continue movableLoop;
-      }
-
-      candidates.push(value);
-    }
-
-    if (candidates.length < 2)
-      return false;
-
-    for (j = candidates.length - 1; j >= 0; j--) {
-      for (k = movedProperties.length - 1; k >= 0; k--) {
-        if (movedProperties[k][4] == candidates[j]) {
-          propertiesAndMergableTokens.unshift([movedProperties[k], mergeableTokens]);
-          break;
-        }
-      }
-    }
-
-    return processMultiPropertyMove(position, propertiesAndMergableTokens);
-  }
-
-  function processMultiPropertyMove(position, propertiesAndMergableTokens) {
-    var valueSize = 0;
-    var properties = [];
-    var property;
-
-    for (var i = propertiesAndMergableTokens.length - 1; i >= 0; i--) {
-      property = propertiesAndMergableTokens[i][0];
-      var fullValue = property[4];
-      valueSize += fullValue.length + (i > 0 ? 1 : 0);
-
-      properties.push(property);
-    }
-
-    var mergeableTokens = propertiesAndMergableTokens[0][1];
-    var bestFit = findAllFits(mergeableTokens, valueSize, properties.length)[0];
-    if (bestFit[1] > 0)
-      return false;
-
-    var allSelectors = [];
-    var qualifiedTokens = [];
-    for (i = bestFit[0].length - 1; i >= 0; i--) {
-      allSelectors = bestFit[0][i][1].concat(allSelectors);
-      qualifiedTokens.unshift(bestFit[0][i]);
-    }
-
-    allSelectors = tidyRuleDuplicates(allSelectors);
-    dropAsNewTokenAt(position, properties, allSelectors, qualifiedTokens);
-
-    for (i = properties.length - 1; i >= 0; i--) {
-      property = properties[i];
-      var index = movedProperties.indexOf(property);
-
-      delete movableTokens[property[4]];
-
-      if (index > -1 && movedToBeDropped.indexOf(index) == -1)
-        movedToBeDropped.push(index);
-    }
-
-    return true;
-  }
-
-  function boundToAnotherPropertyInCurrrentToken(property, movedProperty, token) {
-    var propertyName = property[0];
-    var movedPropertyName = movedProperty[0];
-    if (propertyName != movedPropertyName)
-      return false;
-
-    var key = movedProperty[4];
-    var toMove = movableTokens[key];
-    return toMove && toMove.indexOf(token) > -1;
-  }
-
-  for (var i = tokens.length - 1; i >= 0; i--) {
-    var token = tokens[i];
-    var isRule;
-    var j, k, m;
-    var samePropertyAt;
-
-    if (token[0] == Token.RULE) {
-      isRule = true;
-    } else if (token[0] == Token.NESTED_BLOCK) {
-      isRule = false;
-    } else {
-      continue;
-    }
-
-    // We cache movedProperties.length as it may change in the loop
-    var movedCount = movedProperties.length;
-
-    var properties = extractProperties(token);
-    movedToBeDropped = [];
-
-    var unmovableInCurrentToken = [];
-    for (j = properties.length - 1; j >= 0; j--) {
-      for (k = j - 1; k >= 0; k--) {
-        if (!canReorderSingle(properties[j], properties[k], specificityCache)) {
-          unmovableInCurrentToken.push(j);
-          break;
-        }
-      }
-    }
-
-    for (j = properties.length - 1; j >= 0; j--) {
-      var property = properties[j];
-      var movedSameProperty = false;
-
-      for (k = 0; k < movedCount; k++) {
-        var movedProperty = movedProperties[k];
-
-        if (movedToBeDropped.indexOf(k) == -1 && (!canReorderSingle(property, movedProperty, specificityCache) && !boundToAnotherPropertyInCurrrentToken(property, movedProperty, token) ||
-            movableTokens[movedProperty[4]] && movableTokens[movedProperty[4]].length === mergeLimit)) {
-          dropPropertiesAt(i + 1, movedProperty, token);
-
-          if (movedToBeDropped.indexOf(k) == -1) {
-            movedToBeDropped.push(k);
-            delete movableTokens[movedProperty[4]];
-          }
-        }
-
-        if (!movedSameProperty) {
-          movedSameProperty = property[0] == movedProperty[0] && property[1] == movedProperty[1];
-
-          if (movedSameProperty) {
-            samePropertyAt = k;
-          }
-        }
-      }
-
-      if (!isRule || unmovableInCurrentToken.indexOf(j) > -1)
-        continue;
-
-      var key = property[4];
-
-      if (movedSameProperty && movedProperties[samePropertyAt][5].length + property[5].length > mergeLimit) {
-        dropPropertiesAt(i + 1, movedProperties[samePropertyAt]);
-        movedProperties.splice(samePropertyAt, 1);
-        movableTokens[key] = [token];
-        movedSameProperty = false;
-      } else {
-        movableTokens[key] = movableTokens[key] || [];
-        movableTokens[key].push(token);
-      }
-
-      if (movedSameProperty) {
-        movedProperties[samePropertyAt] = cloneAndMergeSelectors(movedProperties[samePropertyAt], property);
-      } else {
-        movedProperties.push(property);
-      }
-    }
-
-    movedToBeDropped = movedToBeDropped.sort(naturalSorter);
-    for (j = 0, m = movedToBeDropped.length; j < m; j++) {
-      var dropAt = movedToBeDropped[j] - j;
-      movedProperties.splice(dropAt, 1);
-    }
-  }
-
-  var position = tokens[0] && tokens[0][0] == Token.AT_RULE && tokens[0][1].indexOf('@charset') === 0 ? 1 : 0;
-  for (; position < tokens.length - 1; position++) {
-    var isImportRule = tokens[position][0] === Token.AT_RULE && tokens[position][1].indexOf('@import') === 0;
-    var isComment = tokens[position][0] === Token.COMMENT;
-    if (!(isImportRule || isComment))
-      break;
-  }
-
-  for (i = 0; i < movedProperties.length; i++) {
-    dropPropertiesAt(position, movedProperties[i]);
-  }
-}
-
-module.exports = restructure;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/rules-overlap.js b/node_modules/clean-css/lib/optimizer/level-2/rules-overlap.js
deleted file mode 100644
index 811a517b2..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/rules-overlap.js
+++ /dev/null
@@ -1,32 +0,0 @@
-var MODIFIER_PATTERN = /\-\-.+$/;
-
-function rulesOverlap(rule1, rule2, bemMode) {
-  var scope1;
-  var scope2;
-  var i, l;
-  var j, m;
-
-  for (i = 0, l = rule1.length; i < l; i++) {
-    scope1 = rule1[i][1];
-
-    for (j = 0, m = rule2.length; j < m; j++) {
-      scope2 = rule2[j][1];
-
-      if (scope1 == scope2) {
-        return true;
-      }
-
-      if (bemMode && withoutModifiers(scope1) == withoutModifiers(scope2)) {
-        return true;
-      }
-    }
-  }
-
-  return false;
-}
-
-function withoutModifiers(scope) {
-  return scope.replace(MODIFIER_PATTERN, '');
-}
-
-module.exports = rulesOverlap;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/specificities-overlap.js b/node_modules/clean-css/lib/optimizer/level-2/specificities-overlap.js
deleted file mode 100644
index bde037446..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/specificities-overlap.js
+++ /dev/null
@@ -1,34 +0,0 @@
-var specificity = require('./specificity');
-
-function specificitiesOverlap(selector1, selector2, cache) {
-  var specificity1;
-  var specificity2;
-  var i, l;
-  var j, m;
-
-  for (i = 0, l = selector1.length; i < l; i++) {
-    specificity1 = findSpecificity(selector1[i][1], cache);
-
-    for (j = 0, m = selector2.length; j < m; j++) {
-      specificity2 = findSpecificity(selector2[j][1], cache);
-
-      if (specificity1[0] === specificity2[0] && specificity1[1] === specificity2[1] && specificity1[2] === specificity2[2]) {
-        return true;
-      }
-    }
-  }
-
-  return false;
-}
-
-function findSpecificity(selector, cache) {
-  var value;
-
-  if (!(selector in cache)) {
-    cache[selector] = value = specificity(selector);
-  }
-
-  return value || cache[selector];
-}
-
-module.exports = specificitiesOverlap;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/specificity.js b/node_modules/clean-css/lib/optimizer/level-2/specificity.js
deleted file mode 100644
index bbd224f15..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/specificity.js
+++ /dev/null
@@ -1,77 +0,0 @@
-var Marker = require('../../tokenizer/marker');
-
-var Selector = {
-  ADJACENT_SIBLING: '+',
-  DESCENDANT: '>',
-  DOT: '.',
-  HASH: '#',
-  NON_ADJACENT_SIBLING: '~',
-  PSEUDO: ':'
-};
-
-var LETTER_PATTERN = /[a-zA-Z]/;
-var NOT_PREFIX = ':not(';
-var SEPARATOR_PATTERN = /[\s,\(>~\+]/;
-
-function specificity(selector) {
-  var result = [0, 0, 0];
-  var character;
-  var isEscaped;
-  var isSingleQuoted;
-  var isDoubleQuoted;
-  var roundBracketLevel = 0;
-  var couldIntroduceNewTypeSelector;
-  var withinNotPseudoClass = false;
-  var wasPseudoClass = false;
-  var i, l;
-
-  for (i = 0, l = selector.length; i < l; i++) {
-    character = selector[i];
-
-    if (isEscaped) {
-      // noop
-    } else if (character == Marker.SINGLE_QUOTE && !isDoubleQuoted && !isSingleQuoted) {
-      isSingleQuoted = true;
-    } else if (character == Marker.SINGLE_QUOTE && !isDoubleQuoted && isSingleQuoted) {
-      isSingleQuoted = false;
-    } else if (character == Marker.DOUBLE_QUOTE && !isDoubleQuoted && !isSingleQuoted) {
-      isDoubleQuoted = true;
-    } else if (character == Marker.DOUBLE_QUOTE && isDoubleQuoted && !isSingleQuoted) {
-      isDoubleQuoted = false;
-    } else if (isSingleQuoted || isDoubleQuoted) {
-      continue;
-    } else if (roundBracketLevel > 0 && !withinNotPseudoClass) {
-      // noop
-    } else if (character == Marker.OPEN_ROUND_BRACKET) {
-      roundBracketLevel++;
-    } else if (character == Marker.CLOSE_ROUND_BRACKET && roundBracketLevel == 1) {
-      roundBracketLevel--;
-      withinNotPseudoClass = false;
-    } else if (character == Marker.CLOSE_ROUND_BRACKET) {
-      roundBracketLevel--;
-    } else if (character == Selector.HASH) {
-      result[0]++;
-    } else if (character == Selector.DOT || character == Marker.OPEN_SQUARE_BRACKET) {
-      result[1]++;
-    } else if (character == Selector.PSEUDO && !wasPseudoClass && !isNotPseudoClass(selector, i)) {
-      result[1]++;
-      withinNotPseudoClass = false;
-    } else if (character == Selector.PSEUDO) {
-      withinNotPseudoClass = true;
-    } else if ((i === 0 || couldIntroduceNewTypeSelector) && LETTER_PATTERN.test(character)) {
-      result[2]++;
-    }
-
-    isEscaped = character == Marker.BACK_SLASH;
-    wasPseudoClass = character == Selector.PSEUDO;
-    couldIntroduceNewTypeSelector = !isEscaped && SEPARATOR_PATTERN.test(character);
-  }
-
-  return result;
-}
-
-function isNotPseudoClass(selector, index) {
-  return selector.indexOf(NOT_PREFIX, index) === index;
-}
-
-module.exports = specificity;
diff --git a/node_modules/clean-css/lib/optimizer/level-2/tidy-rule-duplicates.js b/node_modules/clean-css/lib/optimizer/level-2/tidy-rule-duplicates.js
deleted file mode 100644
index 30a9c2177..000000000
--- a/node_modules/clean-css/lib/optimizer/level-2/tidy-rule-duplicates.js
+++ /dev/null
@@ -1,21 +0,0 @@
-function ruleSorter(s1, s2) {
-  return s1[1] > s2[1] ? 1 : -1;
-}
-
-function tidyRuleDuplicates(rules) {
-  var list = [];
-  var repeated = [];
-
-  for (var i = 0, l = rules.length; i < l; i++) {
-    var rule = rules[i];
-
-    if (repeated.indexOf(rule[1]) == -1) {
-      repeated.push(rule[1]);
-      list.push(rule);
-    }
-  }
-
-  return list.sort(ruleSorter);
-}
-
-module.exports = tidyRuleDuplicates;
diff --git a/node_modules/clean-css/lib/optimizer/remove-unused.js b/node_modules/clean-css/lib/optimizer/remove-unused.js
deleted file mode 100644
index 7b90c4079..000000000
--- a/node_modules/clean-css/lib/optimizer/remove-unused.js
+++ /dev/null
@@ -1,11 +0,0 @@
-function removeUnused(properties) {
-  for (var i = properties.length - 1; i >= 0; i--) {
-    var property = properties[i];
-
-    if (property.unused) {
-      property.all.splice(property.position, 1);
-    }
-  }
-}
-
-module.exports = removeUnused;
diff --git a/node_modules/clean-css/lib/optimizer/restore-from-optimizing.js b/node_modules/clean-css/lib/optimizer/restore-from-optimizing.js
deleted file mode 100644
index ebd69c2ac..000000000
--- a/node_modules/clean-css/lib/optimizer/restore-from-optimizing.js
+++ /dev/null
@@ -1,69 +0,0 @@
-var Hack = require('./hack');
-
-var Marker = require('../tokenizer/marker');
-
-var ASTERISK_HACK = '*';
-var BACKSLASH_HACK = '\\';
-var IMPORTANT_TOKEN = '!important';
-var UNDERSCORE_HACK = '_';
-var BANG_HACK = '!ie';
-
-function restoreFromOptimizing(properties, restoreCallback) {
-  var property;
-  var restored;
-  var current;
-  var i;
-
-  for (i = properties.length - 1; i >= 0; i--) {
-    property = properties[i];
-
-    if (property.unused) {
-      continue;
-    }
-
-    if (!property.dirty && !property.important && !property.hack) {
-      continue;
-    }
-
-    if (restoreCallback) {
-      restored = restoreCallback(property);
-      property.value = restored;
-    } else {
-      restored = property.value;
-    }
-
-    if (property.important) {
-      restoreImportant(property);
-    }
-
-    if (property.hack) {
-      restoreHack(property);
-    }
-
-    if ('all' in property) {
-      current = property.all[property.position];
-      current[1][1] = property.name;
-
-      current.splice(2, current.length - 1);
-      Array.prototype.push.apply(current, restored);
-    }
-  }
-}
-
-function restoreImportant(property) {
-  property.value[property.value.length - 1][1] += IMPORTANT_TOKEN;
-}
-
-function restoreHack(property) {
-  if (property.hack[0] == Hack.UNDERSCORE) {
-    property.name = UNDERSCORE_HACK + property.name;
-  } else if (property.hack[0] == Hack.ASTERISK) {
-    property.name = ASTERISK_HACK + property.name;
-  } else if (property.hack[0] == Hack.BACKSLASH) {
-    property.value[property.value.length - 1][1] += BACKSLASH_HACK + property.hack[1];
-  } else if (property.hack[0] == Hack.BANG) {
-    property.value[property.value.length - 1][1] += Marker.SPACE + BANG_HACK;
-  }
-}
-
-module.exports = restoreFromOptimizing;
diff --git a/node_modules/clean-css/lib/optimizer/validator.js b/node_modules/clean-css/lib/optimizer/validator.js
deleted file mode 100644
index fd3fb97e4..000000000
--- a/node_modules/clean-css/lib/optimizer/validator.js
+++ /dev/null
@@ -1,529 +0,0 @@
-var functionNoVendorRegexStr = '[A-Z]+(\\-|[A-Z]|[0-9])+\\(.*?\\)';
-var functionVendorRegexStr = '\\-(\\-|[A-Z]|[0-9])+\\(.*?\\)';
-var variableRegexStr = 'var\\(\\-\\-[^\\)]+\\)';
-var functionAnyRegexStr = '(' + variableRegexStr + '|' + functionNoVendorRegexStr + '|' + functionVendorRegexStr + ')';
-
-var calcRegex = new RegExp('^(\\-moz\\-|\\-webkit\\-)?calc\\([^\\)]+\\)$', 'i');
-var decimalRegex = /[0-9]/;
-var functionAnyRegex = new RegExp('^' + functionAnyRegexStr + '$', 'i');
-var hslColorRegex = /^hsl\(\s{0,31}[\-\.]?\d+\s{0,31},\s{0,31}\.?\d+%\s{0,31},\s{0,31}\.?\d+%\s{0,31}\)|hsla\(\s{0,31}[\-\.]?\d+\s{0,31},\s{0,31}\.?\d+%\s{0,31},\s{0,31}\.?\d+%\s{0,31},\s{0,31}\.?\d+\s{0,31}\)$/;
-var identifierRegex = /^(\-[a-z0-9_][a-z0-9\-_]*|[a-z][a-z0-9\-_]*)$/i;
-var namedEntityRegex = /^[a-z]+$/i;
-var prefixRegex = /^-([a-z0-9]|-)*$/i;
-var rgbColorRegex = /^rgb\(\s{0,31}[\d]{1,3}\s{0,31},\s{0,31}[\d]{1,3}\s{0,31},\s{0,31}[\d]{1,3}\s{0,31}\)|rgba\(\s{0,31}[\d]{1,3}\s{0,31},\s{0,31}[\d]{1,3}\s{0,31},\s{0,31}[\d]{1,3}\s{0,31},\s{0,31}[\.\d]+\s{0,31}\)$/;
-var timingFunctionRegex = /^(cubic\-bezier|steps)\([^\)]+\)$/;
-var validTimeUnits = ['ms', 's'];
-var urlRegex = /^url\([\s\S]+\)$/i;
-var variableRegex = new RegExp('^' + variableRegexStr + '$', 'i');
-
-var eightValueColorRegex = /^#[0-9a-f]{8}$/i;
-var fourValueColorRegex = /^#[0-9a-f]{4}$/i;
-var sixValueColorRegex = /^#[0-9a-f]{6}$/i;
-var threeValueColorRegex = /^#[0-9a-f]{3}$/i;
-
-var DECIMAL_DOT = '.';
-var MINUS_SIGN = '-';
-var PLUS_SIGN = '+';
-
-var Keywords = {
-  '^': [
-    'inherit',
-    'initial',
-    'unset'
-  ],
-  '*-style': [
-    'auto',
-    'dashed',
-    'dotted',
-    'double',
-    'groove',
-    'hidden',
-    'inset',
-    'none',
-    'outset',
-    'ridge',
-    'solid'
-  ],
-  '*-timing-function': [
-    'ease',
-    'ease-in',
-    'ease-in-out',
-    'ease-out',
-    'linear',
-    'step-end',
-    'step-start'
-  ],
-  'animation-direction': [
-    'alternate',
-    'alternate-reverse',
-    'normal',
-    'reverse'
-  ],
-  'animation-fill-mode': [
-    'backwards',
-    'both',
-    'forwards',
-    'none'
-  ],
-  'animation-iteration-count': [
-    'infinite'
-  ],
-  'animation-name': [
-    'none'
-  ],
-  'animation-play-state': [
-    'paused',
-    'running'
-  ],
-  'background-attachment': [
-    'fixed',
-    'inherit',
-    'local',
-    'scroll'
-  ],
-  'background-clip': [
-    'border-box',
-    'content-box',
-    'inherit',
-    'padding-box',
-    'text'
-  ],
-  'background-origin': [
-    'border-box',
-    'content-box',
-    'inherit',
-    'padding-box'
-  ],
-  'background-position': [
-    'bottom',
-    'center',
-    'left',
-    'right',
-    'top'
-  ],
-  'background-repeat': [
-    'no-repeat',
-    'inherit',
-    'repeat',
-    'repeat-x',
-    'repeat-y',
-    'round',
-    'space'
-  ],
-  'background-size': [
-    'auto',
-    'cover',
-    'contain'
-  ],
-  'border-collapse': [
-    'collapse',
-    'inherit',
-    'separate'
-  ],
-  'bottom': [
-    'auto'
-  ],
-  'clear': [
-    'both',
-    'left',
-    'none',
-    'right'
-  ],
-  'color': [
-    'transparent'
-  ],
-  'cursor': [
-    'all-scroll',
-    'auto',
-    'col-resize',
-    'crosshair',
-    'default',
-    'e-resize',
-    'help',
-    'move',
-    'n-resize',
-    'ne-resize',
-    'no-drop',
-    'not-allowed',
-    'nw-resize',
-    'pointer',
-    'progress',
-    'row-resize',
-    's-resize',
-    'se-resize',
-    'sw-resize',
-    'text',
-    'vertical-text',
-    'w-resize',
-    'wait'
-  ],
-  'display': [
-    'block',
-    'inline',
-    'inline-block',
-    'inline-table',
-    'list-item',
-    'none',
-    'table',
-    'table-caption',
-    'table-cell',
-    'table-column',
-    'table-column-group',
-    'table-footer-group',
-    'table-header-group',
-    'table-row',
-    'table-row-group'
-  ],
-  'float': [
-    'left',
-    'none',
-    'right'
-  ],
-  'left': [
-    'auto'
-  ],
-  'font': [
-    'caption',
-    'icon',
-    'menu',
-    'message-box',
-    'small-caption',
-    'status-bar',
-    'unset'
-  ],
-  'font-size': [
-    'large',
-    'larger',
-    'medium',
-    'small',
-    'smaller',
-    'x-large',
-    'x-small',
-    'xx-large',
-    'xx-small'
-  ],
-  'font-stretch': [
-    'condensed',
-    'expanded',
-    'extra-condensed',
-    'extra-expanded',
-    'normal',
-    'semi-condensed',
-    'semi-expanded',
-    'ultra-condensed',
-    'ultra-expanded'
-  ],
-  'font-style': [
-    'italic',
-    'normal',
-    'oblique'
-  ],
-  'font-variant': [
-    'normal',
-    'small-caps'
-  ],
-  'font-weight': [
-    '100',
-    '200',
-    '300',
-    '400',
-    '500',
-    '600',
-    '700',
-    '800',
-    '900',
-    'bold',
-    'bolder',
-    'lighter',
-    'normal'
-  ],
-  'line-height': [
-    'normal'
-  ],
-  'list-style-position': [
-    'inside',
-    'outside'
-  ],
-  'list-style-type': [
-    'armenian',
-    'circle',
-    'decimal',
-    'decimal-leading-zero',
-    'disc',
-    'decimal|disc', // this is the default value of list-style-type, see comment in compactable.js
-    'georgian',
-    'lower-alpha',
-    'lower-greek',
-    'lower-latin',
-    'lower-roman',
-    'none',
-    'square',
-    'upper-alpha',
-    'upper-latin',
-    'upper-roman'
-  ],
-  'overflow': [
-    'auto',
-    'hidden',
-    'scroll',
-    'visible'
-  ],
-  'position': [
-    'absolute',
-    'fixed',
-    'relative',
-    'static'
-  ],
-  'right': [
-    'auto'
-  ],
-  'text-align': [
-    'center',
-    'justify',
-    'left',
-    'left|right', // this is the default value of list-style-type, see comment in compactable.js
-    'right'
-  ],
-  'text-decoration': [
-    'line-through',
-    'none',
-    'overline',
-    'underline'
-  ],
-  'text-overflow': [
-    'clip',
-    'ellipsis'
-  ],
-  'top': [
-    'auto'
-  ],
-  'vertical-align': [
-    'baseline',
-    'bottom',
-    'middle',
-    'sub',
-    'super',
-    'text-bottom',
-    'text-top',
-    'top'
-  ],
-  'visibility': [
-    'collapse',
-    'hidden',
-    'visible'
-  ],
-  'white-space': [
-    'normal',
-    'nowrap',
-    'pre'
-  ],
-  'width': [
-    'inherit',
-    'initial',
-    'medium',
-    'thick',
-    'thin'
-  ]
-};
-
-var Units = [
-  '%',
-  'ch',
-  'cm',
-  'em',
-  'ex',
-  'in',
-  'mm',
-  'pc',
-  'pt',
-  'px',
-  'rem',
-  'vh',
-  'vm',
-  'vmax',
-  'vmin',
-  'vw'
-];
-
-function isColor(value) {
-  return value != 'auto' &&
-    (
-      isKeyword('color')(value) ||
-      isHexColor(value) ||
-      isColorFunction(value) ||
-      isNamedEntity(value)
-    );
-}
-
-function isColorFunction(value) {
-  return isRgbColor(value) || isHslColor(value);
-}
-
-function isDynamicUnit(value) {
-  return calcRegex.test(value);
-}
-
-function isFunction(value) {
-  return functionAnyRegex.test(value);
-}
-
-function isHexColor(value) {
-  return threeValueColorRegex.test(value) || fourValueColorRegex.test(value) || sixValueColorRegex.test(value) || eightValueColorRegex.test(value);
-}
-
-function isHslColor(value) {
-  return hslColorRegex.test(value);
-}
-
-function isIdentifier(value) {
-  return identifierRegex.test(value);
-}
-
-function isImage(value) {
-  return value == 'none' || value == 'inherit' || isUrl(value);
-}
-
-function isKeyword(propertyName) {
-  return function(value) {
-    return Keywords[propertyName].indexOf(value) > -1;
-  };
-}
-
-function isNamedEntity(value) {
-  return namedEntityRegex.test(value);
-}
-
-function isNumber(value) {
-  return scanForNumber(value) == value.length;
-}
-
-function isRgbColor(value) {
-  return rgbColorRegex.test(value);
-}
-
-function isPrefixed(value) {
-  return prefixRegex.test(value);
-}
-
-function isPositiveNumber(value) {
-  return isNumber(value) &&
-    parseFloat(value) >= 0;
-}
-
-function isVariable(value) {
-  return variableRegex.test(value);
-}
-
-function isTime(value) {
-  var numberUpTo = scanForNumber(value);
-
-  return numberUpTo == value.length && parseInt(value) === 0 ||
-    numberUpTo > -1 && validTimeUnits.indexOf(value.slice(numberUpTo + 1)) > -1;
-}
-
-function isTimingFunction() {
-  var isTimingFunctionKeyword = isKeyword('*-timing-function');
-
-  return function (value) {
-    return isTimingFunctionKeyword(value) || timingFunctionRegex.test(value);
-  };
-}
-
-function isUnit(validUnits, value) {
-  var numberUpTo = scanForNumber(value);
-
-  return numberUpTo == value.length && parseInt(value) === 0 ||
-    numberUpTo > -1 && validUnits.indexOf(value.slice(numberUpTo + 1)) > -1 ||
-    value == 'auto' ||
-    value == 'inherit';
-}
-
-function isUrl(value) {
-  return urlRegex.test(value);
-}
-
-function isZIndex(value) {
-  return value == 'auto' ||
-    isNumber(value) ||
-    isKeyword('^')(value);
-}
-
-function scanForNumber(value) {
-  var hasDot = false;
-  var hasSign = false;
-  var character;
-  var i, l;
-
-  for (i = 0, l = value.length; i < l; i++) {
-    character = value[i];
-
-    if (i === 0 && (character == PLUS_SIGN || character == MINUS_SIGN)) {
-      hasSign = true;
-    } else if (i > 0 && hasSign && (character == PLUS_SIGN || character == MINUS_SIGN)) {
-      return i - 1;
-    } else if (character == DECIMAL_DOT && !hasDot) {
-      hasDot = true;
-    } else if (character == DECIMAL_DOT && hasDot) {
-      return i - 1;
-    } else if (decimalRegex.test(character)) {
-      continue;
-    } else {
-      return i - 1;
-    }
-  }
-
-  return i;
-}
-
-function validator(compatibility) {
-  var validUnits = Units.slice(0).filter(function (value) {
-    return !(value in compatibility.units) || compatibility.units[value] === true;
-  });
-
-  return {
-    colorOpacity: compatibility.colors.opacity,
-    isAnimationDirectionKeyword: isKeyword('animation-direction'),
-    isAnimationFillModeKeyword: isKeyword('animation-fill-mode'),
-    isAnimationIterationCountKeyword: isKeyword('animation-iteration-count'),
-    isAnimationNameKeyword: isKeyword('animation-name'),
-    isAnimationPlayStateKeyword: isKeyword('animation-play-state'),
-    isTimingFunction: isTimingFunction(),
-    isBackgroundAttachmentKeyword: isKeyword('background-attachment'),
-    isBackgroundClipKeyword: isKeyword('background-clip'),
-    isBackgroundOriginKeyword: isKeyword('background-origin'),
-    isBackgroundPositionKeyword: isKeyword('background-position'),
-    isBackgroundRepeatKeyword: isKeyword('background-repeat'),
-    isBackgroundSizeKeyword: isKeyword('background-size'),
-    isColor: isColor,
-    isColorFunction: isColorFunction,
-    isDynamicUnit: isDynamicUnit,
-    isFontKeyword: isKeyword('font'),
-    isFontSizeKeyword: isKeyword('font-size'),
-    isFontStretchKeyword: isKeyword('font-stretch'),
-    isFontStyleKeyword: isKeyword('font-style'),
-    isFontVariantKeyword: isKeyword('font-variant'),
-    isFontWeightKeyword: isKeyword('font-weight'),
-    isFunction: isFunction,
-    isGlobal: isKeyword('^'),
-    isHslColor: isHslColor,
-    isIdentifier: isIdentifier,
-    isImage: isImage,
-    isKeyword: isKeyword,
-    isLineHeightKeyword: isKeyword('line-height'),
-    isListStylePositionKeyword: isKeyword('list-style-position'),
-    isListStyleTypeKeyword: isKeyword('list-style-type'),
-    isNumber: isNumber,
-    isPrefixed: isPrefixed,
-    isPositiveNumber: isPositiveNumber,
-    isRgbColor: isRgbColor,
-    isStyleKeyword: isKeyword('*-style'),
-    isTime: isTime,
-    isUnit: isUnit.bind(null, validUnits),
-    isUrl: isUrl,
-    isVariable: isVariable,
-    isWidth: isKeyword('width'),
-    isZIndex: isZIndex
-  };
-}
-
-module.exports = validator;
diff --git a/node_modules/clean-css/lib/optimizer/wrap-for-optimizing.js b/node_modules/clean-css/lib/optimizer/wrap-for-optimizing.js
deleted file mode 100644
index c516fbc4a..000000000
--- a/node_modules/clean-css/lib/optimizer/wrap-for-optimizing.js
+++ /dev/null
@@ -1,191 +0,0 @@
-var Hack = require('./hack');
-
-var Marker = require('../tokenizer/marker');
-var Token = require('../tokenizer/token');
-
-var Match = {
-  ASTERISK: '*',
-  BACKSLASH: '\\',
-  BANG: '!',
-  BANG_SUFFIX_PATTERN: /!\w+$/,
-  IMPORTANT_TOKEN: '!important',
-  IMPORTANT_TOKEN_PATTERN: new RegExp('!important$', 'i'),
-  IMPORTANT_WORD: 'important',
-  IMPORTANT_WORD_PATTERN: new RegExp('important$', 'i'),
-  SUFFIX_BANG_PATTERN: /!$/,
-  UNDERSCORE: '_',
-  VARIABLE_REFERENCE_PATTERN: /var\(--.+\)$/
-};
-
-function wrapAll(properties, includeVariable, skipProperties) {
-  var wrapped = [];
-  var single;
-  var property;
-  var i;
-
-  for (i = properties.length - 1; i >= 0; i--) {
-    property = properties[i];
-
-    if (property[0] != Token.PROPERTY) {
-      continue;
-    }
-
-    if (!includeVariable && someVariableReferences(property)) {
-      continue;
-    }
-
-    if (skipProperties && skipProperties.indexOf(property[1][1]) > -1) {
-      continue;
-    }
-
-    single = wrapSingle(property);
-    single.all = properties;
-    single.position = i;
-    wrapped.unshift(single);
-  }
-
-  return wrapped;
-}
-
-function someVariableReferences(property) {
-  var i, l;
-  var value;
-
-  // skipping `property` and property name tokens
-  for (i = 2, l = property.length; i < l; i++) {
-    value = property[i];
-
-    if (value[0] != Token.PROPERTY_VALUE) {
-      continue;
-    }
-
-    if (isVariableReference(value[1])) {
-      return true;
-    }
-  }
-
-  return false;
-}
-
-function isVariableReference(value) {
-  return Match.VARIABLE_REFERENCE_PATTERN.test(value);
-}
-
-function isMultiplex(property) {
-  var value;
-  var i, l;
-
-  for (i = 3, l = property.length; i < l; i++) {
-    value = property[i];
-
-    if (value[0] == Token.PROPERTY_VALUE && (value[1] == Marker.COMMA || value[1] == Marker.FORWARD_SLASH)) {
-      return true;
-    }
-  }
-
-  return false;
-}
-
-function hackFrom(property) {
-  var match = false;
-  var name = property[1][1];
-  var lastValue = property[property.length - 1];
-
-  if (name[0] == Match.UNDERSCORE) {
-    match = [Hack.UNDERSCORE];
-  } else if (name[0] == Match.ASTERISK) {
-    match = [Hack.ASTERISK];
-  } else if (lastValue[1][0] == Match.BANG && !lastValue[1].match(Match.IMPORTANT_WORD_PATTERN)) {
-    match = [Hack.BANG];
-  } else if (lastValue[1].indexOf(Match.BANG) > 0 && !lastValue[1].match(Match.IMPORTANT_WORD_PATTERN) && Match.BANG_SUFFIX_PATTERN.test(lastValue[1])) {
-    match = [Hack.BANG];
-  } else if (lastValue[1].indexOf(Match.BACKSLASH) > 0 && lastValue[1].indexOf(Match.BACKSLASH) == lastValue[1].length - Match.BACKSLASH.length - 1) {
-    match = [Hack.BACKSLASH, lastValue[1].substring(lastValue[1].indexOf(Match.BACKSLASH) + 1)];
-  } else if (lastValue[1].indexOf(Match.BACKSLASH) === 0 && lastValue[1].length == 2) {
-    match = [Hack.BACKSLASH, lastValue[1].substring(1)];
-  }
-
-  return match;
-}
-
-function isImportant(property) {
-  if (property.length < 3)
-    return false;
-
-  var lastValue = property[property.length - 1];
-  if (Match.IMPORTANT_TOKEN_PATTERN.test(lastValue[1])) {
-    return true;
-  } else if (Match.IMPORTANT_WORD_PATTERN.test(lastValue[1]) && Match.SUFFIX_BANG_PATTERN.test(property[property.length - 2][1])) {
-    return true;
-  }
-
-  return false;
-}
-
-function stripImportant(property) {
-  var lastValue = property[property.length - 1];
-  var oneButLastValue = property[property.length - 2];
-
-  if (Match.IMPORTANT_TOKEN_PATTERN.test(lastValue[1])) {
-    lastValue[1] = lastValue[1].replace(Match.IMPORTANT_TOKEN_PATTERN, '');
-  } else {
-    lastValue[1] = lastValue[1].replace(Match.IMPORTANT_WORD_PATTERN, '');
-    oneButLastValue[1] = oneButLastValue[1].replace(Match.SUFFIX_BANG_PATTERN, '');
-  }
-
-  if (lastValue[1].length === 0) {
-    property.pop();
-  }
-
-  if (oneButLastValue[1].length === 0) {
-    property.pop();
-  }
-}
-
-function stripPrefixHack(property) {
-  property[1][1] = property[1][1].substring(1);
-}
-
-function stripSuffixHack(property, hackFrom) {
-  var lastValue = property[property.length - 1];
-  lastValue[1] = lastValue[1]
-    .substring(0, lastValue[1].indexOf(hackFrom[0] == Hack.BACKSLASH ? Match.BACKSLASH : Match.BANG))
-    .trim();
-
-  if (lastValue[1].length === 0) {
-    property.pop();
-  }
-}
-
-function wrapSingle(property) {
-  var importantProperty = isImportant(property);
-  if (importantProperty) {
-    stripImportant(property);
-  }
-
-  var whichHack = hackFrom(property);
-  if (whichHack[0] == Hack.ASTERISK || whichHack[0] == Hack.UNDERSCORE) {
-    stripPrefixHack(property);
-  } else if (whichHack[0] == Hack.BACKSLASH || whichHack[0] == Hack.BANG) {
-    stripSuffixHack(property, whichHack);
-  }
-
-  return {
-    block: property[2] && property[2][0] == Token.PROPERTY_BLOCK,
-    components: [],
-    dirty: false,
-    hack: whichHack,
-    important: importantProperty,
-    name: property[1][1],
-    multiplex: property.length > 3 ? isMultiplex(property) : false,
-    position: 0,
-    shorthand: false,
-    unused: false,
-    value: property.slice(2)
-  };
-}
-
-module.exports = {
-  all: wrapAll,
-  single: wrapSingle
-};