Tidy up event internals, delete empty event keys in `off`, return `this` early in `stopListening`
Tidy up event internals, delete empty event keys in `off`, return `this` early in `stopListening`

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