Merging issue #216 (+ others) validation on Collection#create.
Merging issue #216 (+ others) validation on Collection#create.

Krasnyanskiy/backbone,sitexa/backbone,jewsroch/backbone,Khan/backbone,webcoding/backbone,heroazure/backbone,ntgn81/backbone,IsoldaJS/isolda-pubsub,jmeas/backbone,mpapp/backbone,cailong1028/backbone,fanhc019/backbone,aihua/backbone,Bug2014/backbone,liudianpeng/backbone,rwaldron/backbone,Khan/backbone,sunday-star/backbone,akre54/backbone,alekskorolev/lightbones,zhoufan879/backbone,Krasnyanskiy/backbone,lujocom/backbone,timebackzhou/backbone,wxmfront/backbone,vlazzle/ax-todos,gfranko/backbone,virtru-components/backbone,tibic/backbone,vin100bk/backbone,cailong1028/backbone,linalu1/backbone,Diwahars/backbone,gfranko/backbone,embarknow/backbone,akre54/backbone,craigmichaelmartin/backbone,christianqw/backbone,hugohua/backbone,GerHobbelt/backbone,dcheepurupalli/backbone,chyeh727/backbone,luffy94608/backbone,edgeware/backbone,sumyfly/backbone,streamablevideo/backbone,moimikey/backbone,jstrimpel/backbone,malandrew/backbone,gdi2290/backbone,Khan/backbone,darrrk/backbone,ohbarye/backbone,trizko/backbone,IsoldaJS/isolda-models,ereddate/backbone,LovelyL25/backbone.js,ebsco/backbone,ohbarye/backbone,webapp/library,tibic/backbone,wangdahoo/backbone,mrblueblue/backbone,oss-practice/backbone,yuhualingfeng/backbone,moccen/backbone,wangcan2014/backbone,GrimDerp/backbone,wushuyi/backbone,npmcomponent/jashkenas-backbone,addyosmani/backbone,wjb12/backbone,timebackzhou/backbone,dillonforrest/backbone-df,feychenie/backbone,christianqw/backbone,linalu1/backbone,udhayam/backbone,maryrosecook/backbone-df-2,lastjune/backbone,huanglp47/backbone,dillonforrest/backbone-df,micho/backbone-prototype,nvoron23/backbone,ridixcr/backbone,gmaclennan/backbone,wxmfront/backbone,ThisIsManta/Backbone,nvoron23/backbone,vincent1988/backbone,micho/backbone-prototype,wakanpaladin/mybackbone,howtolearntocode/backbone,yawenl/backbone,chyeh727/backbone,batigoal1980/backbone_example,LovelyL25/backbone.js,zgl2007dj/backbone,megawac/backbone,yuhualingfeng/backbone,rashmisajjan/backbone,zdespolit/backbone,luffy94608/backbone,ereddate/backbone,liudianpeng/backbone,ThiagoGarciaAlves/backbone,ridixcr/backbone,tadwhitaker/backbone,lujocom/backbone,honger05/backbone,nikolas/backbone,zhangdimelody/backbone,paulfalgout/backbone,jashkenas/backbone,ntgn81/backbone,cbas/backbone_todo,maryrosecook/backbone-df-2,sumyfly/backbone,ebsco/backbone,Niades/backbone,maryrosecook/backbone-df,wushuyi/backbone,nikolas/backbone,jstrimpel/backbone,d2s/backbone,mmolinastudio/backbone,jungjung917/backbone,anhtholee/backbone,zgl2007dj/backbone,guahanweb/backbone,premkumargithub/backbone,premkumargithub/backbone,npmcomponent/solutionio-backbone,maryrosecook/backbone-df,wjb12/backbone,feychenie/backbone,dillonforrest/backbone-df-2,Connectlegendary/backbone,Sachin-Ganesh/backbone,moimikey/backbone,mmolinastudio/backbone,tgriesser/backbone,moccen/backbone,Akkuma/backbone,dak/backbone,FormidableLabs/backbone,gougouGet/backbone,youprofit/backbone,pandoraui/backbone,leimd/backbone,addyosmani/backbone,yawenl/backbone,JesseQin/backbone,juggy/backbone,gmaclennan/backbone,maryrosecook/backbone-df,dillonforrest/backbone-df-2,ywenjinlin/backbone,ThisIsManta/Backbone,zhangwei001/backbone,elma-cao/backbone,sueyeh/backbone,au-phiware/backbone,vin100bk/backbone,amitpatange88/backbonejs,dak/backbone,Diwahars/backbone,Aplopio/backbone,webapp/library,honger05/backbone,vincent1988/backbone,platinumazure/backbone,GrimDerp/backbone,FishbaitHarry/backbone,jashkenas/backbone,heroazure/backbone,pandoraui/backbone,amitpatange88/backbonejs,dillonforrest/backbone-df-2,Flip120/backbone,batigoal1980/backbone_example,webcoding/backbone,au-phiware/backbone,youprofit/backbone,zhangdimelody/backbone,7213/backbone,edgeware/backbone,componentizr/backbone,neocotic/hipbone,malandrew/backbone,lastjune/backbone,guigrpa/backbone,getshuvo/backbone,getshuvo/backbone,sueyeh/backbone,udhayam/backbone,jungjung917/backbone,ywenjinlin/backbone,dillonforrest/backbone-df,wangcan2014/backbone,ppker/backbone,GerHobbelt/backbone,sitexa/backbone,ThiagoGarciaAlves/backbone,jordansexton/backboner,jewsroch/backbone,leimd/backbone,trizko/backbone,mrblueblue/backbone,aihua/backbone,tzkKrbys/backbone,rashmisajjan/backbone,Flip120/backbone,wakanpaladin/mybackbone,kuychaco/backbone,npmcomponent/solutionio-backbone,rjz/boneless,amdjs/backbone,JesseQin/backbone,jmeas/backbone,zhangwei001/backbone,craigmichaelmartin/backbone,neocotic/hipbone,DannyDelott/backbone,kuychaco/backbone,maryrosecook/backbone-df-2,fanhc019/backbone,7213/backbone,braddunbar/backbone,elancom/backbone,FishbaitHarry/backbone,gougouGet/backbone,elancom/backbone,Niades/backbone,Connectlegendary/backbone,jasoncbautista/backboneX,wangdahoo/backbone,jridgewell/backbone,embarknow/backbone,tadwhitaker/backbone,dcheepurupalli/backbone,Aplopio/backbone,Sachin-Ganesh/backbone,zhoufan879/backbone,jridgewell/backbone,guahanweb/backbone,cgvarela/backbone,zdespolit/backbone,closeio/backbone,alekskorolev/lightbones,anhtholee/backbone,howtolearntocode/backbone,darrrk/backbone,DannyDelott/backbone,huanglp47/backbone,sunday-star/backbone,vlazzle/ax-todos,elma-cao/backbone,closeio/backbone,Aplopio/backbone,streamablevideo/backbone,christianqw/backbone,antoniogarrote/backbone,platinumazure/backbone,Bug2014/backbone,braddunbar/backbone,rwaldron/backbone,paulfalgout/backbone,ppker/backbone,cgvarela/backbone,gitterHQ/backbone,tzkKrbys/backbone,d2s/backbone