Add app id for comments moderation

This way we can be notified when any new comment appear in the docs/blog and add moderators
Community round-up #9

http://fooo.fr:4000/react/blog/2013/10/03/community-roundup-9.html
- nit picking
- ReactDOMTextArea: moving initialValue change to getInitialState
- escapeTestForBrowser: removing require invariant + adding short circuit
- small change to console.warn for the jsx transformer - now links to the correct id on the page
- now supporting booleans in textareas
- all the tests pass \o/
Merge branch 'master' of https://github.com/facebook/react