added code climate back to README

Author: amkirwan

README.md

@@ -1,4 +1,5 @@
-[![Build Status](https://travis-ci.org/amkirwan/ember-oauth2.png)](https://travis-ci.org/amkirwan/ember-oauth2) 
+[![Build Status](https://travis-ci.org/amkirwan/ember-oauth2.png)](https://travis-ci.org/amkirwan/ember-oauth2) [![Code Climate](https://codeclimate.com/github/amkirwan/ember-oauth2.png)](https://codeclimate.com/github/amkirwan/ember-oauth2)
+
 
 ember-oauth2
 ============