Added Gitter badge

Gitter.im is a chat app, could be useful as an alternative to IRC.

Author: paulbjensen

README.md

@@ -1,7 +1,7 @@
 ![SocketStream!](https://github.com/socketstream/socketstream/raw/master/new_project/client/static/images/logo.png)
 
 # SocketStream
-[![Build Status](https://api.travis-ci.org/socketstream/socketstream.png?branch=master)](https://travis-ci.org/socketstream/socketstream) [![Dependency Status](https://david-dm.org/socketstream/socketstream.png)](https://david-dm.org/socketstream/socketstream#info=dependencies) [![devDependency Status](https://david-dm.org/socketstream/socketstream/dev-status.png)](https://david-dm.org/socketstream/socketstream#info=devDependencies) [![Code Climate](https://codeclimate.com/github/socketstream/socketstream.png)](https://codeclimate.com/github/socketstream/socketstream)
+[![Build Status](https://api.travis-ci.org/socketstream/socketstream.png?branch=master)](https://travis-ci.org/socketstream/socketstream) [![Dependency Status](https://david-dm.org/socketstream/socketstream.png)](https://david-dm.org/socketstream/socketstream#info=dependencies) [![devDependency Status](https://david-dm.org/socketstream/socketstream/dev-status.png)](https://david-dm.org/socketstream/socketstream#info=devDependencies) [![Code Climate](https://codeclimate.com/github/socketstream/socketstream.png)](https://codeclimate.com/github/socketstream/socketstream) [![Gitter chat](https://badges.gitter.im/socketstream.png)](https://gitter.im/socketstream)