Add documentation for Model#sync, Collection#sync.
Add documentation for Model#sync, Collection#sync.

jashkenas/backbone,JesseQin/backbone,guigrpa/backbone,jashkenas/backbone,webapp/library,guahanweb/backbone,amitpatange88/backbonejs,leimd/backbone,cailong1028/backbone,Bug2014/backbone,pandoraui/backbone,rashmisajjan/backbone,trizko/backbone,craigmichaelmartin/backbone,GrimDerp/backbone,paulfalgout/backbone,Krasnyanskiy/backbone,batigoal1980/backbone_example,darrrk/backbone,youprofit/backbone,embarknow/backbone,zgl2007dj/backbone,au-phiware/backbone,lujocom/backbone,FishbaitHarry/backbone,gmaclennan/backbone,honger05/backbone,jewsroch/backbone,cgvarela/backbone,kuychaco/backbone,ywenjinlin/backbone,anhtholee/backbone,zhoufan879/backbone,feychenie/backbone,wangdahoo/backbone,zhangdimelody/backbone,dcheepurupalli/backbone,antoniogarrote/backbone,Sachin-Ganesh/backbone,dillonforrest/backbone-df-2,LovelyL25/backbone.js,gfranko/backbone,GerHobbelt/backbone,Diwahars/backbone,tibic/backbone,moccen/backbone,amitpatange88/backbonejs,huanglp47/backbone,closeio/backbone,wushuyi/backbone,cgvarela/backbone,dillonforrest/backbone-df-2,sueyeh/backbone,au-phiware/backbone,rjz/boneless,virtru-components/backbone,ereddate/backbone,howtolearntocode/backbone,ohbarye/backbone,zhangwei001/backbone,vincent1988/backbone,zhangdimelody/backbone,heroazure/backbone,Akkuma/backbone,jstrimpel/backbone,trizko/backbone,tadwhitaker/backbone,jstrimpel/backbone,yawenl/backbone,braddunbar/backbone,Bug2014/backbone,oss-practice/backbone,vincent1988/backbone,Flip120/backbone,webapp/library,liudianpeng/backbone,streamablevideo/backbone,edgeware/backbone,embarknow/backbone,anhtholee/backbone,tibic/backbone,wushuyi/backbone,braddunbar/backbone,dillonforrest/backbone-df,maryrosecook/backbone-df-2,wangcan2014/backbone,platinumazure/backbone,getshuvo/backbone,ppker/backbone,premkumargithub/backbone,moccen/backbone,batigoal1980/backbone_example,npmcomponent/solutionio-backbone,wxmfront/backbone,mmolinastudio/backbone,Niades/backbone,udhayam/backbone,gitterHQ/backbone,GerHobbelt/backbone,gfranko/backbone,yuhualingfeng/backbone,youprofit/backbone,Connectlegendary/backbone,aihua/backbone,udhayam/backbone,jungjung917/backbone,sumyfly/backbone,maryrosecook/backbone-df,hugohua/backbone,moimikey/backbone,zdespolit/backbone,maryrosecook/backbone-df,pandoraui/backbone,getshuvo/backbone,sueyeh/backbone,yawenl/backbone,vin100bk/backbone,lastjune/backbone,sunday-star/backbone,amdjs/backbone,7213/backbone,jordansexton/backboner,Aplopio/backbone,mrblueblue/backbone,liudianpeng/backbone,nvoron23/backbone,zhangwei001/backbone,lujocom/backbone,akre54/backbone,chyeh727/backbone,nikolas/backbone,ridixcr/backbone,ereddate/backbone,jungjung917/backbone,ThiagoGarciaAlves/backbone,alekskorolev/lightbones,ohbarye/backbone,yuhualingfeng/backbone,tgriesser/backbone,linalu1/backbone,npmcomponent/solutionio-backbone,Aplopio/backbone,zdespolit/backbone,jewsroch/backbone,FishbaitHarry/backbone,elma-cao/backbone,wjb12/backbone,luffy94608/backbone,moimikey/backbone,jridgewell/backbone,zgl2007dj/backbone,Diwahars/backbone,honger05/backbone,ppker/backbone,streamablevideo/backbone,webcoding/backbone,ThisIsManta/Backbone,maryrosecook/backbone-df-2,componentizr/backbone,sumyfly/backbone,mrblueblue/backbone,wjb12/backbone,ntgn81/backbone,Krasnyanskiy/backbone,feychenie/backbone,Flip120/backbone,Aplopio/backbone,tadwhitaker/backbone,ebsco/backbone,gougouGet/backbone,webcoding/backbone,mmolinastudio/backbone,elma-cao/backbone,DannyDelott/backbone,dillonforrest/backbone-df,timebackzhou/backbone,JesseQin/backbone,wakanpaladin/mybackbone,tzkKrbys/backbone,rashmisajjan/backbone,GrimDerp/backbone,fanhc019/backbone,nvoron23/backbone,nikolas/backbone,luffy94608/backbone,gmaclennan/backbone,7213/backbone,ThiagoGarciaAlves/backbone,dak/backbone,LovelyL25/backbone.js,Niades/backbone,darrrk/backbone,kuychaco/backbone,craigmichaelmartin/backbone,DannyDelott/backbone,alekskorolev/lightbones,npmcomponent/jashkenas-backbone,maryrosecook/backbone-df-2,tzkKrbys/backbone,wakanpaladin/mybackbone,elancom/backbone,sunday-star/backbone,Khan/backbone,wangcan2014/backbone,leimd/backbone,elancom/backbone,lastjune/backbone,sitexa/backbone,platinumazure/backbone,fanhc019/backbone,maryrosecook/backbone-df,paulfalgout/backbone,Sachin-Ganesh/backbone,howtolearntocode/backbone,jridgewell/backbone,dak/backbone,jmeas/backbone,megawac/backbone,ridixcr/backbone,linalu1/backbone,neocotic/hipbone,Khan/backbone,dillonforrest/backbone-df,edgeware/backbone,huanglp47/backbone,timebackzhou/backbone,cailong1028/backbone,jmeas/backbone,dcheepurupalli/backbone,Khan/backbone,wangdahoo/backbone,dillonforrest/backbone-df-2,premkumargithub/backbone,vin100bk/backbone,gdi2290/backbone,IsoldaJS/isolda-pubsub,Connectlegendary/backbone,FormidableLabs/backbone,chyeh727/backbone,ywenjinlin/backbone,closeio/backbone,wxmfront/backbone,heroazure/backbone,ntgn81/backbone,jasoncbautista/backboneX,ebsco/backbone,aihua/backbone,guahanweb/backbone,gougouGet/backbone,zhoufan879/backbone,mpapp/backbone,neocotic/hipbone,IsoldaJS/isolda-models,akre54/backbone,ThisIsManta/Backbone,sitexa/backbone