slightly saner validation on initialize.
slightly saner validation on initialize.

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