Improve some comments
Improve some comments

add715/ReactiveCocoa,valleyman86/ReactiveCocoa,dz1111/ReactiveCocoa,BrooksWon/ReactiveCocoa,leichunfeng/ReactiveCocoa,itschaitanya/ReactiveCocoa,xiaobing2007/ReactiveCocoa,FelixYin66/ReactiveCocoa,200895045/ReactiveCocoa,LHDsimon/ReactiveCocoa,kaylio/ReactiveCocoa,gengjf/ReactiveCocoa,Eveian/ReactiveCocoa,jackywpy/ReactiveCocoa,sdhzwm/ReactiveCocoa,Liquidsoul/ReactiveCocoa,shaohung001/ReactiveCocoa,monkeydbobo/ReactiveCocoa,on99/ReactiveCocoa,dz1111/ReactiveCocoa,stevielu/ReactiveCocoa,jeelun/ReactiveCocoa,DongDongDongDong/ReactiveCocoa,xiaoliyang/ReactiveCocoa,yangshengchaoios/ReactiveCocoa,sugar2010/ReactiveCocoa,ddc391565320/ReactiveCocoa,longv2go/ReactiveCocoa,icepy/ReactiveCocoa,brasbug/ReactiveCocoa,stevielu/ReactiveCocoa,RuiAAPeres/ReactiveCocoa,andersio/ReactiveCocoa,sujeking/ReactiveCocoa,shaohung001/ReactiveCocoa,sdhzwm/ReactiveCocoa,esttorhe/ReactiveCocoa,takeshineshiro/ReactiveCocoa,jam891/ReactiveCocoa,terry408911/ReactiveCocoa,brasbug/ReactiveCocoa,jrmiddle/ReactiveCocoa,sdhzwm/ReactiveCocoa,SuPair/ReactiveCocoa,natestedman/ReactiveCocoa,eyu1988/ReactiveCocoa,smilypeda/ReactiveCocoa,LHDsimon/ReactiveCocoa,sandyway/ReactiveCocoa,sandyway/ReactiveCocoa,jrmiddle/ReactiveCocoa,clg0118/ReactiveCocoa,mtxs007/ReactiveCocoa,takeshineshiro/ReactiveCocoa,RuiAAPeres/ReactiveCocoa,tonyarnold/ReactiveCocoa,dachaoisme/ReactiveCocoa,AlanJN/ReactiveCocoa,Ethan89/ReactiveCocoa,leichunfeng/ReactiveCocoa,juliangrosshauser/ReactiveCocoa,chao95957/ReactiveCocoa,huiping192/ReactiveCocoa,bscarano/ReactiveCocoa,alvinvarghese/ReactiveCocoa,kevin-zqw/ReactiveCocoa,CQXfly/ReactiveCocoa,hbucius/ReactiveCocoa,chao95957/ReactiveCocoa,zzzworm/ReactiveCocoa,j364960953/ReactiveCocoa,gengjf/ReactiveCocoa,ReactiveCocoa/ReactiveSwift,calebd/ReactiveCocoa,andersio/ReactiveCocoa,Khan/ReactiveCocoa,zhiwen1024/ReactiveCocoa,bensonday/ReactiveCocoa,AndyZhaoHe/ReactiveCocoa,SanChain/ReactiveCocoa,nickcheng/ReactiveCocoa,beni55/ReactiveCocoa,liufeigit/ReactiveCocoa,hoanganh6491/ReactiveCocoa,CCOOOOLL/ReactiveCocoa,BrooksWon/ReactiveCocoa,esttorhe/ReactiveCocoa,ztchena/ReactiveCocoa,mxxiv/ReactiveCocoa,Eveian/ReactiveCocoa,mattpetters/ReactiveCocoa,yizzuide/ReactiveCocoa,isghe/ReactiveCocoa,pzw224/ReactiveCocoa,longv2go/ReactiveCocoa,natestedman/ReactiveCocoa,windgo/ReactiveCocoa,cogddo/ReactiveCocoa,Farteen/ReactiveCocoa,zhiwen1024/ReactiveCocoa,stevielu/ReactiveCocoa,add715/ReactiveCocoa,loupman/ReactiveCocoa,OnTheWay1988/ReactiveCocoa,imkerberos/ReactiveCocoa,ddc391565320/ReactiveCocoa,xulibao/ReactiveCocoa,smilypeda/ReactiveCocoa,OneSmallTree/ReactiveCocoa,zhenlove/ReactiveCocoa,Juraldinio/ReactiveCocoa,luerhouhou/ReactiveCocoa,clg0118/ReactiveCocoa,msdgwzhy6/ReactiveCocoa,vincentiss/ReactiveCocoa,200895045/ReactiveCocoa,brasbug/ReactiveCocoa,cstars135/ReactiveCocoa,FelixYin66/ReactiveCocoa,pzw224/ReactiveCocoa,jsslai/ReactiveCocoa,KuPai32G/ReactiveCocoa,tonyli508/ReactiveCocoa,walkingsmarts/ReactiveCocoa,BlessNeo/ReactiveCocoa,tonyarnold/ReactiveCocoa,zhigang1992/ReactiveCocoa,tiger8888/ReactiveCocoa,eyu1988/ReactiveCocoa,Rupert-RR/ReactiveCocoa,itschaitanya/ReactiveCocoa,zzzworm/ReactiveCocoa,victorlin/ReactiveCocoa,Ricowere/ReactiveCocoa,liufeigit/ReactiveCocoa,llb1119/test,ericzhou2008/ReactiveCocoa,CQXfly/ReactiveCocoa,icepy/ReactiveCocoa,almassapargali/ReactiveCocoa,SuPair/ReactiveCocoa,zzqiltw/ReactiveCocoa,WEIBP/ReactiveCocoa,hj3938/ReactiveCocoa,ztchena/ReactiveCocoa,kaylio/ReactiveCocoa,fanghao085/ReactiveCocoa,ikesyo/ReactiveCocoa,walkingsmarts/ReactiveCocoa,xulibao/ReactiveCocoa,ioshger0125/ReactiveCocoa,JohnJin007/ReactiveCocoa,cstars135/ReactiveCocoa,llb1119/test,zhenlove/ReactiveCocoa,SanChain/ReactiveCocoa,SanChain/ReactiveCocoa,natan/ReactiveCocoa,PSPDFKit-labs/ReactiveCocoa,ReactiveCocoa/ReactiveSwift,jrmiddle/ReactiveCocoa,zzqiltw/ReactiveCocoa,yangyangluoluo/ReactiveCocoa,kiurentu/ReactiveCocoa,stupidfive/ReactiveCocoa,wpstarnice/ReactiveCocoa,zhukaixy/ReactiveCocoa,leelili/ReactiveCocoa,qq644531343/ReactiveCocoa,zhaoguohui/ReactiveCocoa,sandyway/ReactiveCocoa,yaoxiaoyong/ReactiveCocoa,Juraldinio/ReactiveCocoa,Ricowere/ReactiveCocoa,kaylio/ReactiveCocoa,llb1119/test,sugar2010/ReactiveCocoa,tzongw/ReactiveCocoa,esttorhe/ReactiveCocoa,luerhouhou/ReactiveCocoa,goodheart/ReactiveCocoa,towik/ReactiveCocoa,KuPai32G/ReactiveCocoa,jam891/ReactiveCocoa,add715/ReactiveCocoa,cstars135/ReactiveCocoa,GuitarPlayer-Ma/ReactiveCocoa,paulyoung/ReactiveCocoa,BlessNeo/ReactiveCocoa,yizzuide/ReactiveCocoa,Eveian/ReactiveCocoa,dskatz22/ReactiveCocoa,yaoxiaoyong/ReactiveCocoa,kiurentu/ReactiveCocoa,zzzworm/ReactiveCocoa,fhchina/ReactiveCocoa,dullgrass/ReactiveCocoa,PSPDFKit-labs/ReactiveCocoa,yoichitgy/ReactiveCocoa,windgo/ReactiveCocoa,OneSmallTree/ReactiveCocoa,nikita-leonov/ReactiveCocoa,AlanJN/ReactiveCocoa,libiao88/ReactiveCocoa,imkerberos/ReactiveCocoa,hbucius/ReactiveCocoa,stupidfive/ReactiveCocoa,alvinvarghese/ReactiveCocoa,gengjf/ReactiveCocoa,ShawnLeee/ReactiveCocoa,walkingsmarts/ReactiveCocoa,ceekayel/ReactiveCocoa,hbucius/ReactiveCocoa,j364960953/ReactiveCocoa,yangshengchaoios/ReactiveCocoa,fanghao085/ReactiveCocoa,isghe/ReactiveCocoa,Pingco/ReactiveCocoa,zhigang1992/ReactiveCocoa,imkerberos/ReactiveCocoa,yonekawa/ReactiveCocoa,Farteen/ReactiveCocoa,loupman/ReactiveCocoa,JackLian/ReactiveCocoa,icepy/ReactiveCocoa,goodheart/ReactiveCocoa,xumaolin/ReactiveCocoa,Pingco/ReactiveCocoa,libiao88/ReactiveCocoa,qq644531343/ReactiveCocoa,liufeigit/ReactiveCocoa,jackywpy/ReactiveCocoa,on99/ReactiveCocoa,dz1111/ReactiveCocoa,ddc391565320/ReactiveCocoa,JohnJin007/ReactiveCocoa,msdgwzhy6/ReactiveCocoa,zxq3220122/ReactiveCocoa,OnTheWay1988/ReactiveCocoa,Farteen/ReactiveCocoa,beni55/ReactiveCocoa,bensonday/ReactiveCocoa,200895045/ReactiveCocoa,Ricowere/ReactiveCocoa,DongDongDongDong/ReactiveCocoa,victorlin/ReactiveCocoa,Liquidsoul/ReactiveCocoa,luerhouhou/ReactiveCocoa,bscarano/ReactiveCocoa,tonyarnold/ReactiveCocoa,KuPai32G/ReactiveCocoa,nickcheng/ReactiveCocoa,wangqi211/ReactiveCocoa,huiping192/ReactiveCocoa,calebd/ReactiveCocoa,ceekayel/ReactiveCocoa,calebd/ReactiveCocoa,yytong/ReactiveCocoa,Ethan89/ReactiveCocoa,rpowelll/ReactiveCocoa,xiaoliyang/ReactiveCocoa,juliangrosshauser/ReactiveCocoa,nickcheng/ReactiveCocoa,jsslai/ReactiveCocoa,almassapargali/ReactiveCocoa,shaohung001/ReactiveCocoa,mxxiv/ReactiveCocoa,beni55/ReactiveCocoa,tzongw/ReactiveCocoa,yonekawa/ReactiveCocoa,WEIBP/ReactiveCocoa,CCOOOOLL/ReactiveCocoa,wangqi211/ReactiveCocoa,terry408911/ReactiveCocoa,KJin99/ReactiveCocoa,jackywpy/ReactiveCocoa,ReactiveCocoa/ReactiveSwift,buildo/ReactiveCocoa,CQXfly/ReactiveCocoa,tonyli508/ReactiveCocoa,fhchina/ReactiveCocoa,buildo/ReactiveCocoa,dskatz22/ReactiveCocoa,zhiwen1024/ReactiveCocoa,rpowelll/ReactiveCocoa,buildo/ReactiveCocoa,j364960953/ReactiveCocoa,leelili/ReactiveCocoa,yoichitgy/ReactiveCocoa,victorlin/ReactiveCocoa,wpstarnice/ReactiveCocoa,lixar/ReactiveCocoa,richeterre/ReactiveCocoa,chieryw/ReactiveCocoa,LHDsimon/ReactiveCocoa,tornade0913/ReactiveCocoa,AndyZhaoHe/ReactiveCocoa,emodeqidao/ReactiveCocoa,xiaobing2007/ReactiveCocoa,Rupert-RR/ReactiveCocoa,ohwutup/ReactiveCocoa,jaylib/ReactiveCocoa,JackLian/ReactiveCocoa,sugar2010/ReactiveCocoa,vincentiss/ReactiveCocoa,Ethan89/ReactiveCocoa,cogddo/ReactiveCocoa,tonyli508/ReactiveCocoa,clg0118/ReactiveCocoa,tiger8888/ReactiveCocoa,loupman/ReactiveCocoa,howandhao/ReactiveCocoa,richeterre/ReactiveCocoa,zhaoguohui/ReactiveCocoa,on99/ReactiveCocoa,chieryw/ReactiveCocoa,windgo/ReactiveCocoa,xiaobing2007/ReactiveCocoa,tiger8888/ReactiveCocoa,zzqiltw/ReactiveCocoa,sujeking/ReactiveCocoa,GuitarPlayer-Ma/ReactiveCocoa,hilllinux/ReactiveCocoa,Khan/ReactiveCocoa,yonekawa/ReactiveCocoa,jaylib/ReactiveCocoa,WEIBP/ReactiveCocoa,qq644531343/ReactiveCocoa,emodeqidao/ReactiveCocoa,jaylib/ReactiveCocoa,rpowelll/ReactiveCocoa,hilllinux/ReactiveCocoa,nikita-leonov/ReactiveCocoa,kevin-zqw/ReactiveCocoa,huiping192/ReactiveCocoa,Ray0218/ReactiveCocoa,xiaoliyang/ReactiveCocoa,shuxiashusheng/ReactiveCocoa,cnbin/ReactiveCocoa,Juraldinio/ReactiveCocoa,paulyoung/ReactiveCocoa,sujeking/ReactiveCocoa,Rupert-RR/ReactiveCocoa,yytong/ReactiveCocoa,mattpetters/ReactiveCocoa,ztchena/ReactiveCocoa,fhchina/ReactiveCocoa,zhukaixy/ReactiveCocoa,yoichitgy/ReactiveCocoa,chao95957/ReactiveCocoa,mtxs007/ReactiveCocoa,dullgrass/ReactiveCocoa,ikesyo/ReactiveCocoa,yytong/ReactiveCocoa,natan/ReactiveCocoa,mattpetters/ReactiveCocoa,kevin-zqw/ReactiveCocoa,KJin99/ReactiveCocoa,valleyman86/ReactiveCocoa,hoanganh6491/ReactiveCocoa,OnTheWay1988/ReactiveCocoa,fanghao085/ReactiveCocoa,dullgrass/ReactiveCocoa,ShawnLeee/ReactiveCocoa,BrooksWon/ReactiveCocoa,dachaoisme/ReactiveCocoa,OneSmallTree/ReactiveCocoa,xumaolin/ReactiveCocoa,JohnJin007/ReactiveCocoa,Liquidsoul/ReactiveCocoa,lixar/ReactiveCocoa,taylormoonxu/ReactiveCocoa,towik/ReactiveCocoa,ioshger0125/ReactiveCocoa,cnbin/ReactiveCocoa,hj3938/ReactiveCocoa,takeshineshiro/ReactiveCocoa,natan/ReactiveCocoa,zxq3220122/ReactiveCocoa,huiping192/ReactiveCocoa,Ray0218/ReactiveCocoa,ceekayel/ReactiveCocoa,Ricowere/ReactiveCocoa,hj3938/ReactiveCocoa,bscarano/ReactiveCocoa,jeelun/ReactiveCocoa,ShawnLeee/ReactiveCocoa,cnbin/ReactiveCocoa,monkeydbobo/ReactiveCocoa,zxq3220122/ReactiveCocoa,towik/ReactiveCocoa,AlanJN/ReactiveCocoa,yaoxiaoyong/ReactiveCocoa,ericzhou2008/ReactiveCocoa,andersio/ReactiveCocoa,BlessNeo/ReactiveCocoa,msdgwzhy6/ReactiveCocoa,mxxiv/ReactiveCocoa,vincentiss/ReactiveCocoa,ohwutup/ReactiveCocoa,PSPDFKit-labs/ReactiveCocoa,kiurentu/ReactiveCocoa,DreamHill/ReactiveCocoa,howandhao/ReactiveCocoa,tornade0913/ReactiveCocoa,nikita-leonov/ReactiveCocoa,alvinvarghese/ReactiveCocoa,monkeydbobo/ReactiveCocoa,zhaoguohui/ReactiveCocoa,shuxiashusheng/ReactiveCocoa,ericzhou2008/ReactiveCocoa,hoanganh6491/ReactiveCocoa,zhigang1992/ReactiveCocoa,emodeqidao/ReactiveCocoa,itschaitanya/ReactiveCocoa,libiao88/ReactiveCocoa,howandhao/ReactiveCocoa,ioshger0125/ReactiveCocoa,yangyangluoluo/ReactiveCocoa,Pingco/ReactiveCocoa,shuxiashusheng/ReactiveCocoa,DreamHill/ReactiveCocoa,AndyZhaoHe/ReactiveCocoa,eyu1988/ReactiveCocoa,JackLian/ReactiveCocoa,cogddo/ReactiveCocoa,jeelun/ReactiveCocoa,richeterre/ReactiveCocoa,zhenlove/ReactiveCocoa,isghe/ReactiveCocoa,nickcheng/ReactiveCocoa,natestedman/ReactiveCocoa,mtxs007/ReactiveCocoa,terry408911/ReactiveCocoa,esttorhe/ReactiveCocoa,FelixYin66/ReactiveCocoa,CCOOOOLL/ReactiveCocoa,bensonday/ReactiveCocoa,juliangrosshauser/ReactiveCocoa,lixar/ReactiveCocoa,tzongw/ReactiveCocoa,chieryw/ReactiveCocoa,valleyman86/ReactiveCocoa,dskatz22/ReactiveCocoa,SuPair/ReactiveCocoa,ohwutup/ReactiveCocoa,Khan/ReactiveCocoa,leichunfeng/ReactiveCocoa,RuiAAPeres/ReactiveCocoa,yangyangluoluo/ReactiveCocoa,wangqi211/ReactiveCocoa,xulibao/ReactiveCocoa,taylormoonxu/ReactiveCocoa,wpstarnice/ReactiveCocoa,hilllinux/ReactiveCocoa,tornade0913/ReactiveCocoa,zhukaixy/ReactiveCocoa,smilypeda/ReactiveCocoa,goodheart/ReactiveCocoa,stupidfive/ReactiveCocoa,KJin99/ReactiveCocoa,jam891/ReactiveCocoa,yizzuide/ReactiveCocoa,jaylib/ReactiveCocoa,DongDongDongDong/ReactiveCocoa,yangshengchaoios/ReactiveCocoa,xumaolin/ReactiveCocoa,DreamHill/ReactiveCocoa,leelili/ReactiveCocoa,taylormoonxu/ReactiveCocoa,pzw224/ReactiveCocoa,GuitarPlayer-Ma/ReactiveCocoa,dachaoisme/ReactiveCocoa,longv2go/ReactiveCocoa,Ray0218/ReactiveCocoa,paulyoung/ReactiveCocoa,jsslai/ReactiveCocoa,almassapargali/ReactiveCocoa