Get this working

Hi there

I found your JSX plugin, and saw your note re: it not working.  I mucked around with it and managed to get it to build JSX files in my EmberCLI tree.

I included a note about some caveats I encountered in the README, but there's one more:  You must add `/** @jsx React.DOM */` to the top of your .jsx files.  That's a requirement of the JSX transform tool.

Thanks for your work, I hope this helps!