Update CoffeeScript (JSX).cson
Update CoffeeScript (JSX).cson

Limit to only CJSX files. fixes #62
Nihu98/atom-react,blurrah/atom-react,nickhudkins/atom-react,AdshadLib/atom-react,orktes/atom-react,extrabacon/atom-react,gre/atom-react,jeffshaver/atom-react,rylanc/atom-react,MiincGu/atom-react