mention Rationale.md in README.md
mention Rationale.md in README.md

dromato/RxJava,mttkay/RxJava,zsxwing/RxJava,pitatensai/RxJava,sitexa/RxJava,duqiao/RxJava,Siddartha07/RxJava,suclike/RxJava,AttwellBrian/RxJava,A-w-K/RxJava,lncosie/RxJava,wrightm/RxJava,kuanghao/RxJava,A-w-K/RxJava,onepavel/RxJava,TracyLu/RxJava,eduardotrandafilov/RxJava,nurkiewicz/RxJava,ChenWenHuan/RxJava,southwolf/RxJava,Bobjoy/RxJava,hyarlagadda/RxJava,cgpllx/RxJava,hyleung/RxJava,mobilist/RxJava,duqiao/RxJava,marcogarcia23/RxJava,zhongdj/RxJava,Shedings/RxJava,KevinTCoughlin/RxJava,ChenWenHuan/RxJava,nurkiewicz/RxJava,klemzy/RxJava,rabbitcount/RxJava,sanxieryu/RxJava,wehjin/RxJava,mttkay/RxJava,ReactiveX/RxJava,Ryan800/RxJava,forsail/RxJava,ibaca/RxJava,xfumihiro/RxJava,dromato/RxJava,ypresto/RxJava,nkhuyu/RxJava,rabbitcount/RxJava,tilal6991/RxJava,onepavel/RxJava,msdgwzhy6/RxJava,ppiech/RxJava,eduardotrandafilov/RxJava,maugomez77/RxJava,A-w-K/RxJava,ChenWenHuan/RxJava,onepavel/RxJava,spoon-bot/RxJava,mattrjacobs/RxJava,bboyfeiyu/RxJava,ibaca/RxJava,yuhuayi/RxJava,NiteshKant/RxJava,yuhuayi/RxJava,davidmoten/RxJava,kuanghao/RxJava,wrightm/RxJava,puniverse/RxJava,zjrstar/RxJava,androidgilbert/RxJava,sposam/RxJava,lijunhuayc/RxJava,devisnik/RxJava,wehjin/RxJava,abersnaze/RxJava,HuangWenhuan0/RxJava,klemzy/RxJava,nvoron23/RxJava,nkhuyu/RxJava,shekarrex/RxJava,Ribeiro/RxJava,benjchristensen/RxJava,artem-zinnatullin/RxJava,artem-zinnatullin/RxJava,KevinTCoughlin/RxJava,msdgwzhy6/RxJava,yuhuayi/RxJava,sposam/RxJava,simonbasle/RxJava,abersnaze/RxJava,forsail/RxJava,TracyLu/RxJava,zhongdj/RxJava,klemzy/RxJava,HuangWenhuan0/RxJava,ibaca/RxJava,tombujok/RxJava,marcogarcia23/RxJava,nvoron23/RxJava,tilal6991/RxJava,cgpllx/RxJava,hyarlagadda/RxJava,Bobjoy/RxJava,suclike/RxJava,java02014/RxJava,YlJava110/RxJava,stevegury/RxJava,akarnokd/RxJava,Siddartha07/RxJava,aditya-chaturvedi/RxJava,Ryan800/RxJava,fjg1989/RxJava,ronenhamias/RxJava,Eagles2F/RxJava,sunfei/RxJava,forsail/RxJava,Eagles2F/RxJava,jacek-rzrz/RxJava,sposam/RxJava,simonbasle/RxJava,androidyue/RxJava,zsxwing/RxJava,ashwary/RxJava,lncosie/RxJava,zjrstar/RxJava,fjg1989/RxJava,gjesse/RxJava,Ryan800/RxJava,hzysoft/RxJava,ronenhamias/RxJava,kuanghao/RxJava,weikipeng/RxJava,ayushnvijay/RxJava,shekarrex/RxJava,bboyfeiyu/RxJava,lncosie/RxJava,srayhunter/RxJava,pitatensai/RxJava,aditya-chaturvedi/RxJava,elijah513/RxJava,cgpllx/RxJava,southwolf/RxJava,picnic106/RxJava,NiteshKant/RxJava,jacek-rzrz/RxJava,maugomez77/RxJava,runt18/RxJava,jtulach/RxJava,picnic106/RxJava,hyleung/RxJava,markrietveld/RxJava,spoon-bot/RxJava,sunfei/RxJava,takecy/RxJava,markrietveld/RxJava,b-cuts/RxJava,pitatensai/RxJava,jacek-rzrz/RxJava,ronenhamias/RxJava,ReactiveX/RxJava,zhongdj/RxJava,picnic106/RxJava,devagul93/RxJava,AmberWhiteSky/RxJava,devisnik/RxJava,YlJava110/RxJava,sitexa/RxJava,vqvu/RxJava,ashwary/RxJava,ruhkopf/RxJava,stevegury/RxJava,davidmoten/RxJava,hzysoft/RxJava,dromato/RxJava,mattrjacobs/RxJava,frodoking/RxJava,Godchin1990/RxJava,lijunhuayc/RxJava,runt18/RxJava,Ribeiro/RxJava,vqvu/RxJava,wlrhnh-David/RxJava,xfumihiro/RxJava,weikipeng/RxJava,tombujok/RxJava,hzysoft/RxJava,puniverse/RxJava,jbripley/RxJava,mattrjacobs/RxJava,Turbo87/RxJava,Shedings/RxJava,Siddartha07/RxJava,gjesse/RxJava,HuangWenhuan0/RxJava,ruhkopf/RxJava,jbripley/RxJava,puniverse/RxJava,ashwary/RxJava,cloudbearings/RxJava,hyleung/RxJava,elijah513/RxJava,lijunhuayc/RxJava,ypresto/RxJava,davidmoten/RxJava,androidgilbert/RxJava,runt18/RxJava,aditya-chaturvedi/RxJava,msdgwzhy6/RxJava,randall-mo/RxJava,gjesse/RxJava,xfumihiro/RxJava,ppiech/RxJava,Shedings/RxJava,ayushnvijay/RxJava,southwolf/RxJava,b-cuts/RxJava,frodoking/RxJava,fjg1989/RxJava,randall-mo/RxJava,KevinTCoughlin/RxJava,suclike/RxJava,jtulach/RxJava,androidyue/RxJava,androidyue/RxJava,akarnokd/RxJava,androidgilbert/RxJava,java02014/RxJava,takecy/RxJava,AmberWhiteSky/RxJava,zsxwing/RxJava,wrightm/RxJava,devisnik/RxJava,srayhunter/RxJava,nvoron23/RxJava,shekarrex/RxJava,maugomez77/RxJava,abersnaze/RxJava,Eagles2F/RxJava,TracyLu/RxJava,nurkiewicz/RxJava,simonbasle/RxJava,markrietveld/RxJava,srayhunter/RxJava,Godchin1990/RxJava,devagul93/RxJava,eduardotrandafilov/RxJava,Turbo87/RxJava,Godchin1990/RxJava,hyarlagadda/RxJava,sitexa/RxJava,wlrhnh-David/RxJava,abersnaze/RxJava,ypresto/RxJava,ppiech/RxJava,vqvu/RxJava,mobilist/RxJava,sanxieryu/RxJava,ayushnvijay/RxJava,mttkay/RxJava,reactivex/rxjava,Ribeiro/RxJava,Turbo87/RxJava,devisnik/RxJava,takecy/RxJava,tilal6991/RxJava,rabbitcount/RxJava,sanxieryu/RxJava,elijah513/RxJava,wehjin/RxJava,java02014/RxJava,cloudbearings/RxJava,cloudbearings/RxJava,AmberWhiteSky/RxJava,wlrhnh-David/RxJava,marcogarcia23/RxJava,frodoking/RxJava,zjrstar/RxJava,tombujok/RxJava,AttwellBrian/RxJava,Bobjoy/RxJava,nkhuyu/RxJava,jbripley/RxJava,randall-mo/RxJava,devagul93/RxJava,weikipeng/RxJava,stevegury/RxJava,reactivex/rxjava,b-cuts/RxJava,YlJava110/RxJava,duqiao/RxJava,ruhkopf/RxJava,sunfei/RxJava