Added to Readme
Added to Readme

Added the public Hipchat room url for anyone to join.

IGDAStl/gateway2dwest,CaliberMengsk/gateway2dwest,IGDAStl/gateway2dwest,stlgamedev/gateway2dwest,stlgamedev/gateway2dwest,kurtosterhage/gateway2dwest,IGDAStl/gateway2dwest,kurtosterhage/gateway2dwest,stlgamedev/gateway2dwest,CaliberMengsk/gateway2dwest