Use Collection#where for TodoList#remaining
Use Collection#where for TodoList#remaining

Using `Collection#where` for both speed and symmetry.

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