Just as in Capistrano, Linux/Unix/Posix `USER` var should be last resort in determining HipChat user's name in the rake task. `HIPCHAT_USER` now available for overriding config file.
Just as in Capistrano, Linux/Unix/Posix `USER` var should be last resort in determining HipChat user's name in the rake task. `HIPCHAT_USER` now available for overriding config file.

banrui/hipchat-rb,ph/hipchat-rb,onthespotqa/hipchat-rb,hipchat/hipchat-rb,hipchat/hipchat-rb,bonusly/hipchat-rb,bonusly/hipchat-rb,StatusPage/hipchat-rb,scalixte-mdsol/hipchat-rb