Adding the event-loop badge for Code Climate to the readme per conversation with igorw

Author: e3betht

README.md

@@ -2,7 +2,7 @@
 
 Event-driven, non-blocking I/O with PHP.
 
-[![Build Status](https://secure.travis-ci.org/reactphp/react.png?branch=master)](http://travis-ci.org/reactphp/react)
+[![Build Status](https://secure.travis-ci.org/reactphp/react.png?branch=master)](http://travis-ci.org/reactphp/react) [![Code Climate](https://codeclimate.com/github/reactphp/event-loop/badges/gpa.svg)](https://codeclimate.com/github/reactphp/event-loop)
 
 ### Notice - (May 25th, 2014)