If there are n players, only n characters from the xml file are created.
Also, Solo game simply now uses the same GameScene class. A solo game
will try to send messages, but the GameActivity knows whether or not it
actually needs to and halts if not in multiplayer mode.
Adding two character slots in level 1.
Merge branch 'master' of https://github.com/capstone-ua-redepsilon/projectred.git