Buddy List and startGame request/handler

1. **Server:**
* Added basic structure to the startGame handler
* Max user for a new game is now 5 instead of 6

2. **Client:**
* Added Buddy list
* Implemented chat commands for whisper and to add/remove a buddy
* Added a small legend for chat commands
* Fixed login and general lobby layouts
* Added a new empty scene to be filled with meGAMEss logo
* Added Login and Lobby music to the scene