Controller Support

Multiple controllers should be supported. The idea is that it is still possible to use keys and a controller to control one player at the same time. It should also be possible to have one player with a controller while the other one plays with the keyboard.

missing:

• player index is hard coded to 0
• joy movement in axes in not detected
• joy stick set similar to key set -> possible? key assignment on both controllers the same --> for now the button assignment is hardcoded!
• missing multiple joy sticks
• slow keyboard movement when joy sticks are connected
• put down and interact happen at the same time
• switch between players when more than two players
• controller only activated with controller button? (why?)
• test everything: different number of players, different number of controller, keyboard assignment, switching