Updated readme file with new EngineYard Code
Updated readme file with new EngineYard Code

Previous code was deprecated by Engineyard.
hipchat/hipchat-rb,banrui/hipchat-rb,hipchat/hipchat-rb,bonusly/hipchat-rb,StatusPage/hipchat-rb,scalixte-mdsol/hipchat-rb,ph/hipchat-rb,bonusly/hipchat-rb