Change the reference to rails in the 'sync' docs to reflect Rails 4
Change the reference to rails in the 'sync' docs to reflect Rails 4

timebackzhou/backbone,anhtholee/backbone,vincent1988/backbone,oss-practice/backbone,guahanweb/backbone,linalu1/backbone,sunday-star/backbone,7213/backbone,cgvarela/backbone,nikolas/backbone,zdespolit/backbone,ridixcr/backbone,zdespolit/backbone,closeio/backbone,jungjung917/backbone,liudianpeng/backbone,tibic/backbone,akre54/backbone,elma-cao/backbone,braddunbar/backbone,darrrk/backbone,moimikey/backbone,jungjung917/backbone,Niades/backbone,wangcan2014/backbone,chyeh727/backbone,vincent1988/backbone,leimd/backbone,gougouGet/backbone,wxmfront/backbone,youprofit/backbone,howtolearntocode/backbone,nvoron23/backbone,au-phiware/backbone,JesseQin/backbone,dak/backbone,rashmisajjan/backbone,wushuyi/backbone,ThiagoGarciaAlves/backbone,ppker/backbone,yawenl/backbone,zgl2007dj/backbone,kuychaco/backbone,lastjune/backbone,jridgewell/backbone,lujocom/backbone,vin100bk/backbone,platinumazure/backbone,Connectlegendary/backbone,sueyeh/backbone,streamablevideo/backbone,Bug2014/backbone,huanglp47/backbone,alekskorolev/lightbones,guahanweb/backbone,udhayam/backbone,webcoding/backbone,amitpatange88/backbonejs,FishbaitHarry/backbone,ohbarye/backbone,Sachin-Ganesh/backbone,ntgn81/backbone,braddunbar/backbone,wxmfront/backbone,yuhualingfeng/backbone,sunday-star/backbone,DannyDelott/backbone,FormidableLabs/backbone,ereddate/backbone,aihua/backbone,anhtholee/backbone,amitpatange88/backbonejs,timebackzhou/backbone,neocotic/hipbone,npmcomponent/jashkenas-backbone,tadwhitaker/backbone,DannyDelott/backbone,huanglp47/backbone,akre54/backbone,zhangdimelody/backbone,Sachin-Ganesh/backbone,jashkenas/backbone,paulfalgout/backbone,Diwahars/backbone,ppker/backbone,feychenie/backbone,heroazure/backbone,tadwhitaker/backbone,ywenjinlin/backbone,ywenjinlin/backbone,gdi2290/backbone,yawenl/backbone,jewsroch/backbone,getshuvo/backbone,wangdahoo/backbone,nvoron23/backbone,embarknow/backbone,IsoldaJS/isolda-models,premkumargithub/backbone,trizko/backbone,mrblueblue/backbone,craigmichaelmartin/backbone,wangcan2014/backbone,gmaclennan/backbone,ohbarye/backbone,elancom/backbone,guigrpa/backbone,getshuvo/backbone,wjb12/backbone,chyeh727/backbone,leimd/backbone,dak/backbone,trizko/backbone,elma-cao/backbone,vin100bk/backbone,paulfalgout/backbone,mrblueblue/backbone,Krasnyanskiy/backbone,ridixcr/backbone,moccen/backbone,lujocom/backbone,darrrk/backbone,rjz/boneless,elancom/backbone,zhangwei001/backbone,GrimDerp/backbone,moimikey/backbone,dcheepurupalli/backbone,aihua/backbone,jmeas/backbone,moccen/backbone,gmaclennan/backbone,ereddate/backbone,zhangdimelody/backbone,Niades/backbone,streamablevideo/backbone,craigmichaelmartin/backbone,alekskorolev/lightbones,zhangwei001/backbone,udhayam/backbone,Connectlegendary/backbone,tzkKrbys/backbone,fanhc019/backbone,jashkenas/backbone,feychenie/backbone,zhoufan879/backbone,howtolearntocode/backbone,kuychaco/backbone,youprofit/backbone,gitterHQ/backbone,webcoding/backbone,Krasnyanskiy/backbone,fanhc019/backbone,Diwahars/backbone,tzkKrbys/backbone,sitexa/backbone,sitexa/backbone,Flip120/backbone,embarknow/backbone,pandoraui/backbone,jridgewell/backbone,sumyfly/backbone,hugohua/backbone,zgl2007dj/backbone,lastjune/backbone,Bug2014/backbone,platinumazure/backbone,cailong1028/backbone,pandoraui/backbone,sueyeh/backbone,zhoufan879/backbone,wangdahoo/backbone,au-phiware/backbone,IsoldaJS/isolda-pubsub,jmeas/backbone,closeio/backbone,tibic/backbone,sumyfly/backbone,dcheepurupalli/backbone,yuhualingfeng/backbone,JesseQin/backbone,wjb12/backbone,megawac/backbone,FishbaitHarry/backbone,neocotic/hipbone,GrimDerp/backbone,7213/backbone,ntgn81/backbone,ThiagoGarciaAlves/backbone,gougouGet/backbone,jasoncbautista/backboneX,cgvarela/backbone,jewsroch/backbone,wushuyi/backbone,rashmisajjan/backbone,heroazure/backbone,jordansexton/backboner,nikolas/backbone,cailong1028/backbone,Flip120/backbone,linalu1/backbone,premkumargithub/backbone,liudianpeng/backbone