Upgrade React to v0.13.3

[simonrleung]

It's a very useful plugin, Thank you.

[peh]

hey. i am already looking into that. had some issues with 0.13.2 will check if 0.13.3 works

[peh]

hey @simonrleung
if you dont want to be dependant on the provided version i recommend using
https://grails.org/plugins/babel-asset-pipeline

babel brings jsx transformation so you could simply store your components as .es6 files and let babel do the jsx stuff.
if you then download react from http://facebook.github.io/react/downloads.html you can always use the newest version!