Update CONTRIBUTING.md
Update CONTRIBUTING.md

remove references to "only accepting pull requests of bug fixes"
mihailik/TypeScript,RyanCavanaugh/TypeScript,donaldpipowitch/TypeScript,yortus/TypeScript,nojvek/TypeScript,kimamula/TypeScript,weswigham/TypeScript,kimamula/TypeScript,nycdotnet/TypeScript,thr0w/Thr0wScript,kitsonk/TypeScript,plantain-00/TypeScript,erikmcc/TypeScript,DLehenbauer/TypeScript,thr0w/Thr0wScript,rodrigues-daniel/TypeScript,Viromo/TypeScript,basarat/TypeScript,AbubakerB/TypeScript,synaptek/TypeScript,evgrud/TypeScript,Microsoft/TypeScript,nycdotnet/TypeScript,chuckjaz/TypeScript,alexeagle/TypeScript,mmoskal/TypeScript,nycdotnet/TypeScript,jwbay/TypeScript,alexeagle/TypeScript,ziacik/TypeScript,Eyas/TypeScript,vilic/TypeScript,ionux/TypeScript,samuelhorwitz/typescript,ionux/TypeScript,blakeembrey/TypeScript,nojvek/TypeScript,kitsonk/TypeScript,SaschaNaz/TypeScript,DLehenbauer/TypeScript,jeremyepling/TypeScript,evgrud/TypeScript,kpreisser/TypeScript,minestarks/TypeScript,vilic/TypeScript,vilic/TypeScript,weswigham/TypeScript,kimamula/TypeScript,kpreisser/TypeScript,plantain-00/TypeScript,rodrigues-daniel/TypeScript,donaldpipowitch/TypeScript,samuelhorwitz/typescript,ziacik/TypeScript,Viromo/TypeScript,microsoft/TypeScript,yortus/TypeScript,samuelhorwitz/typescript,TukekeSoft/TypeScript,jeremyepling/TypeScript,evgrud/TypeScript,evgrud/TypeScript,Microsoft/TypeScript,mihailik/TypeScript,mihailik/TypeScript,ionux/TypeScript,moander/TypeScript,blakeembrey/TypeScript,mmoskal/TypeScript,Viromo/TypeScript,basarat/TypeScript,fabioparra/TypeScript,rodrigues-daniel/TypeScript,fabioparra/TypeScript,Viromo/TypeScript,moander/TypeScript,nycdotnet/TypeScript,microsoft/TypeScript,rodrigues-daniel/TypeScript,erikmcc/TypeScript,SaschaNaz/TypeScript,Microsoft/TypeScript,microsoft/TypeScript,erikmcc/TypeScript,donaldpipowitch/TypeScript,mihailik/TypeScript,weswigham/TypeScript,ionux/TypeScript,kpreisser/TypeScript,minestarks/TypeScript,yortus/TypeScript,RyanCavanaugh/TypeScript,thr0w/Thr0wScript,jwbay/TypeScript,ziacik/TypeScript,basarat/TypeScript,DLehenbauer/TypeScript,fabioparra/TypeScript,mmoskal/TypeScript,ziacik/TypeScript,mmoskal/TypeScript,samuelhorwitz/typescript,thr0w/Thr0wScript,synaptek/TypeScript,RyanCavanaugh/TypeScript,synaptek/TypeScript,Eyas/TypeScript,vilic/TypeScript,blakeembrey/TypeScript,plantain-00/TypeScript,chuckjaz/TypeScript,Eyas/TypeScript,AbubakerB/TypeScript,SaschaNaz/TypeScript,basarat/TypeScript,donaldpipowitch/TypeScript,nojvek/TypeScript,SaschaNaz/TypeScript,moander/TypeScript,kimamula/TypeScript,yortus/TypeScript,alexeagle/TypeScript,chuckjaz/TypeScript,moander/TypeScript,jwbay/TypeScript,jeremyepling/TypeScript,fabioparra/TypeScript,chuckjaz/TypeScript,jwbay/TypeScript,DLehenbauer/TypeScript,AbubakerB/TypeScript,Eyas/TypeScript,kitsonk/TypeScript,blakeembrey/TypeScript,minestarks/TypeScript,nojvek/TypeScript,AbubakerB/TypeScript,synaptek/TypeScript,plantain-00/TypeScript,TukekeSoft/TypeScript,TukekeSoft/TypeScript,erikmcc/TypeScript