Refuse to log in if the user is already logged in
:musical_score: Update Symfony to 2.4.5
Add authentication tests
Add a symfony form for sending messages
Move AJAX messages to the MessageController

This also adds support for sending messages without Javascript
Add a JSONController
Make sure that a reply can be sent even if AJAX was used to get to the group's URL
Add support for sending new messages without javascript
Use select2 instead of Chosen
Add ability to search for usernames starting with a prefix
1337
Add support for sending messages with Ajax
Minor javascript fixes

Add missing semicolon
Reset the response box after a message has been sent
Remove chosen
Add messaging tests
Fix the build on PHP 5.3
eh... hardly started the player page
Add team abandon feature
Add tests for abandoning teams
Fix typo
Fix messaging tests
Add Controller::success() method