Added React JS
Added React JS

Added Facebook's Latest React JS. Here is a bin showing it work:
http://jsbin.com/UDUlIteK/1/edit?html,js,output

Also, I added version number to the polymer label.
knpwrs/jsbin,mingzeke/jsbin,y3sh/jsbin-fork,carolineartz/jsbin,martinvd/jsbin,yohanboniface/jsbin,simonThiele/jsbin,jsbin/jsbin,mlucool/jsbin,ctide/jsbin,fend-classroom/jsbin,jasonsanjose/jsbin-app,blesh/jsbin,Freeformers/jsbin,martinvd/jsbin,mdo/jsbin,ilyes14/jsbin,mcanthony/jsbin,fgrillo21/NPA-Exam,roman01la/jsbin,HeroicEric/jsbin,KenPowers/jsbin,late-warrior/jsbin,fgrillo21/NPA-Exam,kirjs/jsbin,peterblazejewicz/jsbin,juliankrispel/jsbin,remotty/jsbin,y3sh/jsbin-fork,jsbin/jsbin,arcseldon/jsbin,thsunmy/jsbin,roman01la/jsbin,eggheadio/jsbin,jwdallas/jsbin,carolineartz/jsbin,kentcdodds/jsbin,juliankrispel/jsbin,dedalik/jsbin,yize/jsbin,pandoraui/jsbin,Hamcha/jsbin,dennishu001/jsbin,francoisp/jsbin,late-warrior/jsbin,AverageMarcus/jsbin,KenPowers/jsbin,jasonsanjose/jsbin-app,filamentgroup/jsbin,johnmichel/jsbin,filamentgroup/jsbin,francoisp/jsbin,svacha/jsbin,jwdallas/jsbin,fend-classroom/jsbin,Hamcha/jsbin,dennishu001/jsbin,mlucool/jsbin,dhval/jsbin,jamez14/jsbin,simonThiele/jsbin,kirjs/jsbin,knpwrs/jsbin,digideskio/jsbin,AverageMarcus/jsbin,dhval/jsbin,yize/jsbin,eggheadio/jsbin,ilyes14/jsbin,KenPowers/jsbin,IvanSanchez/jsbin,knpwrs/jsbin,IveWong/jsbin,vipulnsward/jsbin,saikota/jsbin,mingzeke/jsbin,saikota/jsbin,ctide/jsbin,IveWong/jsbin,pandoraui/jsbin,minwe/jsbin,arcseldon/jsbin,Freeformers/jsbin,IvanSanchez/jsbin,svacha/jsbin,jamez14/jsbin,thsunmy/jsbin,mcanthony/jsbin,johnmichel/jsbin,nitaku/jervis,HeroicEric/jsbin,vipulnsward/jsbin,digideskio/jsbin,minwe/jsbin,yohanboniface/jsbin,dedalik/jsbin,peterblazejewicz/jsbin,kentcdodds/jsbin