[DELETE] remove webkitNotifications
[MODIFY] change to use oauth2 web flow for bit.ly
[MODIFY] remove tweetmanager.shortenerAuth
[MODIFY] shortener option is able to change without restart
[MODIFY] change to detection for retrieveBearerToken option
[MODIFY] remove unnecessary code
[MODIFY] change shortener
[MODIFY] add unblock method (currently unuse)
[MODIFY] add support for follow/unfollow/block over streaming api
Version 0.5.3.1