updating README.md with notes on workflows for contributing
updating README.md with notes on workflows for contributing

trello/xctool,bgertzfield/xctool,githubdelegate/xctool,AutoScout24/xctool,bgertzfield/xctool,kcoons/xctool,Richardlihui/xctool,facebook/xctool,modulexcite/xctool,agreco/xctool,leopardpan/xctool,dvor/xctool,bhamiltoncx/xctool,agreco/xctool,PSPDFKit-labs/xctool,AutoScout24/xctool,ACChe/xctool,1yvT0s/xctool,jspahrsummers/xctool,FiftyThree/xctool,lpios/xctool,ACChe/xctool,Monits/xctool,githubdelegate/xctool,ACChe/xctool,kernandreas/xctool,0xced/xctool,leopardpan/xctool,1yvT0s/xctool,lqi/xctool,githubdelegate/xctool,bhamiltoncx/xctool,PSPDFKit-labs/xctool,agreco/xctool,lpios/xctool,trello/xctool,1yvT0s/xctool,kernandreas/xctool,LegNeato/xctool,jspahrsummers/xctool,n054/xctool,facebook/xctool,soundcloud/xctool,Richardlihui/xctool,ACChe/xctool,bgertzfield/xctool,Richardlihui/xctool,ekingo/xctool,leopardpan/xctool,adamjernst/xctool,SuPair/xctool,modulexcite/xctool,bhamiltoncx/xctool,blighli/xctool,dvor/xctool,n054/xctool,ACChe/xctool,Monits/xctool,lqi/xctool,0xced/xctool,kcoons/xctool,yaoxiaoyong/xctool,yaoxiaoyong/xctool,ekingo/xctool,FiftyThree/xctool,n054/xctool,duk42111/xctool,Monits/xctool,PSPDFKit-labs/xctool,ekingo/xctool,trello/xctool,theiren46/xctool,bhamiltoncx/xctool,LegNeato/xctool,adamjernst/xctool,ekingo/xctool,bhamiltoncx/xctool,adamjernst/xctool,LegNeato/xctool,lqi/xctool,jspahrsummers/xctool,theiren46/xctool,soundcloud/xctool,bgertzfield/xctool,PSPDFKit-labs/xctool,facebook/xctool,kamoljan/xctool,dvor/xctool,1yvT0s/xctool,AutoScout24/xctool,bgertzfield/xctool,leopardpan/xctool,kernandreas/xctool,lpios/xctool,blighli/xctool,lpios/xctool,duk42111/xctool,kcoons/xctool,bhamiltoncx/xctool,kamoljan/xctool,yaoxiaoyong/xctool,theiren46/xctool,n054/xctool,LegNeato/xctool,SuPair/xctool,facebook/xctool,SuPair/xctool,kamoljan/xctool,modulexcite/xctool,blighli/xctool,Monits/xctool,ACChe/xctool,yaoxiaoyong/xctool,n054/xctool,PSPDFKit-labs/xctool,blighli/xctool,jspahrsummers/xctool,Richardlihui/xctool,soundcloud/xctool,agreco/xctool,facebook/xctool,trello/xctool,theiren46/xctool,AutoScout24/xctool,facebook/xctool,soundcloud/xctool,duk42111/xctool,n054/xctool,kernandreas/xctool,dvor/xctool,lpios/xctool,modulexcite/xctool,soundcloud/xctool,SuPair/xctool,adamjernst/xctool,bgertzfield/xctool,soundcloud/xctool,FiftyThree/xctool,duk42111/xctool,githubdelegate/xctool,lpios/xctool,kamoljan/xctool,FiftyThree/xctool