add code climate for the hell of it

README.md

@@ -1,6 +1,7 @@
 # "To install, drag this icon..." no more!
 
 [![Build Status](https://travis-ci.org/phinze/homebrew-cask.png?branch=master)](https://travis-ci.org/phinze/homebrew-cask)
+[![Code Climate](https://codeclimate.com/github/phinze/homebrew-cask.png)](https://codeclimate.com/github/phinze/homebrew-cask)
 
 Let's see if we can get the elegance, simplicity, and speed of Homebrew for the
 installation and management GUI Mac applications like Google Chrome and Adium.