Move version-check task into own file

Gruntfile.js is really messy :(
Check src file for version-check task

This lets the task run stand-alone without building
Merge pull request #657 from zpao/grunt-version-check-cleanup

Grunt version check cleanup
test case for ReactTextComponent rootID escaping
fixes ReactTextComponent rootID unescapedness
Merge pull request #670 from subtleGradient/subtlegradient/escape-the-things

the things, escape them
Update npm-react error to point to autoflow
Update npm-react readme to point to autoflow
Upgrade recast dev dependency to v0.5.6.

Paving the way for source maps.