gitter chat room badge

Author: nmccready

README.markdown

@@ -5,6 +5,8 @@
 [![Dependencies](https://david-dm.org/angular-ui/angular-google-maps.png)](https://david-dm.org/angular-ui/angular-google-maps) 
 [![Dependencies](https://david-dm.org/angular-ui/angular-google-maps/dev-status.png)](https://david-dm.org/angular-ui/angular-google-maps) 
 [![Build Status](https://travis-ci.org/angular-ui/angular-google-maps.png?branch=master)](https://travis-ci.org/angular-ui/angular-google-maps)
+
+[![Gitter chat](https://badges.gitter.im/angular-ui/angular-google-maps.png)](https://gitter.im/angular-ui/angular-google-maps)
 ##What is new (1.2.X):
 
 With the minor release of 1.2.0 (which is why it is a minor) there are a few breaking changes: