Revert "Change class selector to id"
Revert "Change class selector to id"

This reverts commit a92267191b05f8290a15ca45338bccf40aee63ef.

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