Fix API.md typo 
Fix API.md typo 

Line 1670: Removes the extra "is" from the sentence 

Register a node-style callback on this promise. When this promise is is either fulfilled or rejected, the node callback will be called back with the node.js convention where error reason is the first argument and success value is the second argument. The error argument will be null in case of success.
justsml/bluebird,peterKaleta/bluebird,starkwang/bluebird,ScheerMT/bluebird,DeX3/bluebird,goofiw/bluebird,javraindawn/bluebird,janmeier/bluebird,ydaniv/bluebird,cwhatley/bluebird,goopscoop/bluebird,Zeratul5/bluebird,janmeier/bluebird,TechnicalPursuit/bluebird,ajitsy/bluebird,jozanza/bluebird,angelxmoreno/bluebird,cgvarela/bluebird,atom-morgan/bluebird,STRML/bluebird,sandrinodimattia/bluebird,code-monkeys/bluebird,StefanoDeVuono/bluebird,atom-morgan/bluebird,P-Seebauer/bluebird,justsml/bluebird,Zeratul5/bluebird,esco/bluebird,haohui/bluebird,STRML/bluebird,enicolasWebs/bluebird,abhishekgahlot/bluebird,HBOCodeLabs/bluebird,matklad/bluebird,ajitsy/bluebird,vladikoff/bluebird,goofiw/bluebird,amelon/bluebird,sandrinodimattia/bluebird,janzal/bluebird,fmoliveira/bluebird,impy88/bluebird,Wanderfalke/bluebird,peterKaleta/bluebird,tpphu/bluebird,robertn702/bluebird,dantheuber/bluebird,developmentstudio/bluebird,impy88/bluebird,HBOCodeLabs/bluebird,yonjah/bluebird,whatupdave/bluebird,alubbe/bluebird,ziad-saab/bluebird,xbenjii/bluebird,JaKXz/bluebird,developmentstudio/bluebird,fmoliveira/bluebird,timnew/bluebird,garysye/bluebird,lo1tuma/bluebird,xbenjii/bluebird,xdevelsistemas/bluebird,joemcelroy/bluebird,techniq/bluebird,cusspvz/bluebird,ronaldbaltus/bluebird,alubbe/bluebird,starkwang/bluebird,haohui/bluebird,goofiw/bluebird,mdarveau/bluebird,spion/bluebird,RobinQu/bluebird,bsiddiqui/bluebird,lindenle/bluebird,P-Seebauer/bluebird,BigDSK/bluebird,xdevelsistemas/bluebird,reggi/bluebird,briandela/bluebird,RobinQu/bluebird,joemcelroy/bluebird,DrewVartanian/bluebird,mdarveau/bluebird,BridgeAR/bluebird,satyadeepk/bluebird,wainage/bluebird,Scientifik/bluebird,djchie/bluebird,henryqdineen/bluebird,gillesdemey/bluebird,matklad/bluebird,codevlabs/bluebird,soyuka/bluebird,rrpod/bluebird,migclark/bluebird,amelon/bluebird,linalu1/bluebird,ricardo-hdz/bluebird,moretti/bluebird,briandela/bluebird,code-monkeys/bluebird,dantheuber/bluebird,davyengone/bluebird,garysye/bluebird,ziad-saab/bluebird,johnculviner/bluebird,cusspvz/bluebird,a25patel/bluebird,moretti/bluebird,vladikoff/bluebird,techniq/bluebird,migclark/bluebird,akinsella/bluebird,janzal/bluebird,djchie/bluebird,ankushg/bluebird,johnculviner/bluebird,amelon/bluebird,paulcbetts/bluebird,Wanderfalke/bluebird,sandrinodimattia/bluebird,tesfaldet/bluebird,kidaa/bluebird,BigDSK/bluebird,ronaldbaltus/bluebird,paulcbetts/bluebird,illahi0/bluebird,ajitsy/bluebird,paulcbetts/bluebird,a25patel/bluebird,BridgeAR/bluebird,javraindawn/bluebird,avinoamr/bluebird,lindenle/bluebird,StefanoDeVuono/bluebird,garysye/bluebird,kidaa/bluebird,bjonica/bluebird,wainage/bluebird,bjonica/bluebird,DeX3/bluebird,n1kolas/bluebird,ryanwholey/bluebird,wainage/bluebird,fadzlan/bluebird,yonjah/bluebird,ryanwholey/bluebird,satyadeepk/bluebird,arenaonline/bluebird,davyengone/bluebird,BigDSK/bluebird,dantheuber/bluebird,yonjah/bluebird,angelxmoreno/bluebird,cgvarela/bluebird,rrpod/bluebird,robertn702/bluebird,janzal/bluebird,javraindawn/bluebird,impy88/bluebird,djchie/bluebird,codevlabs/bluebird,Scientifik/bluebird,atom-morgan/bluebird,janmeier/bluebird,naoufal/bluebird,soyuka/bluebird,goopscoop/bluebird,henryqdineen/bluebird,DrewVartanian/bluebird,kjvalencik/bluebird,mcanthony/bluebird,whatupdave/bluebird,xbenjii/bluebird,ScheerMT/bluebird,henryqdineen/bluebird,kjvalencik/bluebird,linalu1/bluebird,satyadeepk/bluebird,arenaonline/bluebird,angelxmoreno/bluebird,P-Seebauer/bluebird,gillesdemey/bluebird,ScheerMT/bluebird,ankushg/bluebird,Scientifik/bluebird,codevlabs/bluebird,enicolasWebs/bluebird,fadzlan/bluebird,avinoamr/bluebird,TechnicalPursuit/bluebird,timnew/bluebird,enicolasWebs/bluebird,illahi0/bluebird,matklad/bluebird,Wanderfalke/bluebird,cwhatley/bluebird,johnculviner/bluebird,cgvarela/bluebird,kjvalencik/bluebird,spion/bluebird,cwhatley/bluebird,petkaantonov/bluebird,alubbe/bluebird,jozanza/bluebird,code-monkeys/bluebird,esco/bluebird,RobinQu/bluebird,abhishekgahlot/bluebird,petkaantonov/bluebird,fadzlan/bluebird,mdarveau/bluebird,StefanoDeVuono/bluebird,ryanwholey/bluebird,lindenle/bluebird,bjonica/bluebird,bsiddiqui/bluebird,goopscoop/bluebird,mcanthony/bluebird,bsiddiqui/bluebird,naoufal/bluebird,tpphu/bluebird,naoufal/bluebird,joemcelroy/bluebird,abhishekgahlot/bluebird,mcanthony/bluebird,tpphu/bluebird,JaKXz/bluebird,soyuka/bluebird,justsml/bluebird,perfecting/bluebird,ydaniv/bluebird,arenaonline/bluebird,robertn702/bluebird,techniq/bluebird,rrpod/bluebird,akinsella/bluebird,n1kolas/bluebird,ronaldbaltus/bluebird,peterKaleta/bluebird,davyengone/bluebird,moretti/bluebird,DeX3/bluebird,Zeratul5/bluebird,DrewVartanian/bluebird,tesfaldet/bluebird,esco/bluebird,kidaa/bluebird,reggi/bluebird,STRML/bluebird,n1kolas/bluebird,linalu1/bluebird,lo1tuma/bluebird,xdevelsistemas/bluebird,BridgeAR/bluebird,gillesdemey/bluebird,illahi0/bluebird,a25patel/bluebird,whatupdave/bluebird,starkwang/bluebird,cusspvz/bluebird,developmentstudio/bluebird,avinoamr/bluebird,JaKXz/bluebird,HBOCodeLabs/bluebird,TechnicalPursuit/bl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