When rerunning bb init, existing tokens are reused as defaults

Ask for CircleCI token as well
Be able to deploy pull request directly
Notify user on Mac OS X
Ask for HipChat token
Higher limit to take queue into account
Fix CLI messages
Version bump to 0.7.0
Nicer notification message
Auto hipchat message before deploy
Better defaults for nonconfigured BB
Merge pull request #11 from apiaryio/almad/deploy

bb gh deploy <pr>