Add mailing list in README
Add mailing list in README

Shadhopson/bh,luciuschoi/bh,Fullscreen/bh,juliobetta/bh,MichaelSp/bh,luciuschoi/bh,juliobetta/bh,Fullscreen/bh,MichaelSp/bh,chrismayu/bh,Shadhopson/bh,chrismayu/bh,buren/bh