Merge pull request #300 from havvg/1.4

add Gitter badge

Author: havvg

README.markdown

@@ -2,6 +2,7 @@ PropelBundle
 ============
 
 [![Build Status](https://secure.travis-ci.org/propelorm/PropelBundle.png)](http://travis-ci.org/propelorm/PropelBundle)
+[![Gitter](https://badges.gitter.im/Join Chat.svg)](https://gitter.im/propelorm/PropelBundle?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
 This is the official implementation of [Propel](http://www.propelorm.org/) in Symfony2.