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diff --git a/node_modules/merge-stream/README.md b/node_modules/merge-stream/README.md
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+# merge-stream
+
+Merge (interleave) a bunch of streams.
+
+[![build status](https://secure.travis-ci.org/grncdr/merge-stream.svg?branch=master)](http://travis-ci.org/grncdr/merge-stream)
+
+## Synopsis
+
+```javascript
+var stream1 = new Stream();
+var stream2 = new Stream();
+
+var merged = mergeStream(stream1, stream2);
+
+var stream3 = new Stream();
+merged.add(stream3);
+merged.isEmpty();
+//=> false
+```
+
+## Description
+
+This is adapted from [event-stream](https://github.com/dominictarr/event-stream) separated into a new module, using Streams3.
+
+## API
+
+`merged.add`
+
+A method to dynamically add more sources to the stream.
+
+`merged.isEmpty`
+
+A method that tells you if the merged stream is empty.
+
+When a stream is "empty" (aka. no sources were added), it could not be returned to a gulp task.
+
+So, we could do something like this:
+
+```js
+stream = require('merge-stream')();
+// Something like a loop to add some streams to the merge stream
+// stream.add(streamA);
+// stream.add(streamB);
+return stream.isEmpty() ? null : stream;
+```
+
+## License
+
+MIT
diff --git a/node_modules/merge-stream/index.js b/node_modules/merge-stream/index.js
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+'use strict';
+
+var PassThrough = require('readable-stream/passthrough')
+
+module.exports = function (/*streams...*/) {
+  var sources = []
+  var output  = new PassThrough({objectMode: true})
+
+  output.setMaxListeners(0)
+
+  output.add = add
+  output.isEmpty = isEmpty
+
+  output.on('unpipe', remove)
+
+  Array.prototype.slice.call(arguments).forEach(add)
+
+  return output
+
+  function add (source) {
+    if (Array.isArray(source)) {
+      source.forEach(add)
+      return this
+    }
+
+    sources.push(source);
+    source.once('end', remove.bind(null, source))
+    source.pipe(output, {end: false})
+    return this
+  }
+
+  function isEmpty () {
+    return sources.length == 0;
+  }
+
+  function remove (source) {
+    sources = sources.filter(function (it) { return it !== source })
+    if (!sources.length && output.readable) { output.end() }
+  }
+}
diff --git a/node_modules/merge-stream/package.json b/node_modules/merge-stream/package.json
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+{
+  "name": "merge-stream",
+  "version": "1.0.0",
+  "description": "Create a stream that emits events from multiple other streams",
+  "main": "index.js",
+  "files": [
+    "index.js"
+  ],
+  "scripts": {
+    "test": "istanbul cover test.js && istanbul check-cover --statements 100 --branches 100"
+  },
+  "repository": "grncdr/merge-stream",
+  "author": "Stephen Sugden <me@stephensugden.com>",
+  "license": "MIT",
+  "dependencies": {
+    "readable-stream": "^2.0.1"
+  },
+  "devDependencies": {
+    "from2": "^2.0.3",
+    "istanbul": "^0.3.2"
+  }
+}