Add CONTRIBUTING.md file.
Add CONTRIBUTING.md file.

oceanzou123/slideout,Jwsonic/slideout,zhn4/slideout,eboyer10/slideout,swelther/slideout,Jwsonic/slideout,Mindgames/slideout,elisoares/slideout,ezbreaks/slideout,a-tarasyuk/slideout,Charpeni/slideout,evilemon/slideout,cesardanielhg/slideout,krahman/slideout,scrubmx/slideout,Mango/slideout,loki315zx/slideout,Renji/slideout,maxamillion32/slideout,oceanzou123/slideout,alawnchen/slideout,CreepyGnome/slideout,Charpeni/slideout,itzmukeshy7/slideout,ppollo07/slideout,krahman/slideout,Mindgames/slideout,elisoares/slideout,itzmukeshy7/slideout,rockmandew/slideout,swelther/slideout,benfreu/slideout,laputaer/slideout,zhn4/slideout,farzak/slideout,pixelize/slideout,alawnchen/slideout,zxfjessica/slideout,pixelize/slideout,zxfjessica/slideout,farzak/slideout,scrubmx/slideout,rockmandew/slideout,gdseller/slideout,cesardanielhg/slideout,CreepyGnome/slideout,Jeremy017/slideout,Jeremy017/slideout,david84/slideout,loki315zx/slideout,benfreu/slideout,evilemon/slideout,Nikeshsuwal/slideout,Mango/slideout,a-tarasyuk/slideout,zmwybxzy/slideout,ppollo07/slideout,ezbreaks/slideout,zmwybxzy/slideout,gdseller/slideout,Nikeshsuwal/slideout,maxamillion32/slideout,ReKungPaw/slideout,david84/slideout,laputaer/slideout,eboyer10/slideout,ReKungPaw/slideout,Renji/slideout