Clarify CONTRIBUTING.md
Clarify CONTRIBUTING.md

Heads up @zidoms and @erbridge. I shouldn't deal with users and by directing them to another repository I can unwatch I don't have to ;)

Feel free to unwatch also if you don't want to deal with support
crr0004/lime,crr0004/lime,farhaanbukhsh/lime,crr0004/lime,farhaanbukhsh/lime,crr0004/lime,farhaanbukhsh/lime,farhaanbukhsh/lime,farhaanbukhsh/lime,crr0004/lime