Fix #1987 - Mention the removal of `options.index` in the changelog
Fix #1987 - Mention the removal of `options.index` in the changelog

Conflicts:
	index.html

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