Modify package.json for heroku
Add procfile for heroku
Change usernames management to be case insensitive
Modify project to works with mongoHQ and heroku

* mongo connects to mongoHQ url
* errors are reported in logs
* messages are sorted by date reversed because mongoHQ is not yet in v 2.6 (no $lice > 0)
Add bower install call from project npm install call
Add css file in repository
Correct room creation

* When username is not lowerCase, correctly create room