Add Mumble support (#1245)

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+# Data URL Schemes for Go [![wercker status](https://app.wercker.com/status/6f9a2e144dfcc59e862c52459b452928/s "wercker status")](https://app.wercker.com/project/bykey/6f9a2e144dfcc59e862c52459b452928) [![GoDoc](https://godoc.org/github.com/vincent-petithory/dataurl?status.png)](https://godoc.org/github.com/vincent-petithory/dataurl)
+
+This package parses and generates Data URL Schemes for the Go language, according to [RFC 2397](http://tools.ietf.org/html/rfc2397).
+
+Data URLs are small chunks of data commonly used in browsers to display inline data,
+typically like small images, or when you use the FileReader API of the browser.
+
+Common use-cases:
+
+ * generate a data URL out of a `string`, `[]byte`, `io.Reader` for inclusion in HTML templates,
+ * parse a data URL sent by a browser in a http.Handler, and do something with the data (save to disk, etc.)
+ * ...
+
+Install the package with:
+~~~
+go get github.com/vincent-petithory/dataurl
+~~~
+
+## Usage
+
+~~~ go
+package main
+
+import (
+	"github.com/vincent-petithory/dataurl"
+	"fmt"
+)
+
+func main() {
+	dataURL, err := dataurl.DecodeString(`data:text/plain;charset=utf-8;base64,aGV5YQ==`)
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	fmt.Printf("content type: %s, data: %s\n", dataURL.MediaType.ContentType(), string(dataURL.Data))
+	// Output: content type: text/plain, data: heya
+}
+~~~
+
+From a `http.Handler`:
+
+~~~ go
+func handleDataURLUpload(w http.ResponseWriter, r *http.Request) {
+	dataURL, err := dataurl.Decode(r.Body)
+	defer r.Body.Close()
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+	if dataURL.ContentType() == "image/png" {
+		ioutil.WriteFile("image.png", dataURL.Data, 0644)
+	} else {
+		http.Error(w, "not a png", http.StatusBadRequest)
+	}
+}
+~~~
+
+## Command
+
+For convenience, a `dataurl` command is provided to encode/decode dataurl streams.
+
+~~~
+dataurl - Encode or decode dataurl data and print to standard output
+
+Usage: dataurl [OPTION]... [FILE]
+
+  dataurl encodes or decodes FILE or standard input if FILE is - or omitted, and prints to standard output.
+  Unless -mimetype is used, when FILE is specified, dataurl will attempt to detect its mimetype using Go's mime.TypeByExtension (http://golang.org/pkg/mime/#TypeByExtension). If this fails or data is read from STDIN, the mimetype will default to application/octet-stream.
+
+Options:
+  -a=false: encode data using ascii instead of base64
+  -ascii=false: encode data using ascii instead of base64
+  -d=false: decode data instead of encoding
+  -decode=false: decode data instead of encoding
+  -m="": force the mimetype of the data to encode to this value
+  -mimetype="": force the mimetype of the data to encode to this value
+~~~
+
+## Contributing
+
+Feel free to file an issue/make a pull request if you find any bug, or want to suggest enhancements.