Added introduction to the documentation

GetRuntimeAddresses/symbolyze/doc.go

@@ -0,0 +1,26 @@
+// Copyright note...
+/*
+Package symbolyze provides a mechanism to search for all occurences of a
+certain symbol in a selection mmap'ed ELF binaries of all running processes.
+
+NewScanner(symbol string, glob string) will setup a Scanner, which will search
+for the given symbol name in all mmap'ed ELF-files that match the given
+glob-pattern. The glob-pattern is a shell file name pattern, see
+filepath.Match.
+
+The scanner should be populated with callback functions via calls to OnFound(),
+before starting the scan by calling Run().
+
+For example:
+
+	scanner := symbolyze.NewScanner("_PyRuntime", "*python3*")
+
+	scanner.OnFound(func(pid int, offset uint64) error {
+		fmt.Println("found symbol in", pid, "in offset", offset")
+		return nil
+	})
+
+	err := scanner.Run()
+
+*/
+package symbolyze