Merge pull request airbnb#481 from airbnb/harry/css

[other] add links to other style guides

Author: hshoff

README.md

@@ -5,7 +5,11 @@
 [![Downloads](https://img.shields.io/npm/dm/eslint-config-airbnb.svg)](https://www.npmjs.com/package/eslint-config-airbnb)
 [![Gitter](https://badges.gitter.im/Join Chat.svg)](https://gitter.im/airbnb/javascript?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
 
-[For the ES5-only guide click here](es5/).
+Other Style Guides
+ - [ES5](es5/)
+ - [React](react/)
+ - [CSS & Sass](https://github.com/airbnb/css)
+ - [Ruby](https://github.com/airbnb/ruby)
 
 ## Table of Contents