Update README.md

added mozilla's recroom

README.md

@@ -57,6 +57,7 @@ Examples of Slate in the Wild
 
 * [Travis-CI's API docs](http://docs.travis-ci.com/api/)
 * [Mozilla's localForage docs](http://mozilla.github.io/localForage/)
+* [Mozilla Recroom](http://mozilla.github.io/recroom/)
 * [Orchestrate.io API docs](https://docs.orchestrate.io/)
 * [ChaiOne Gameplan API docs](http://chaione.github.io/gameplanb2b/#introduction)
 * [Drcaban's Build a Quine tutorial](http://drcabana.github.io/build-a-quine/#introduction)