Very dirty and hacky version of placing towers and shooting enemies and so on...
Merged master into bholste
Implemented Button with Builder Pattern. Changed Menus and HUD according to new Button Implementation.
Created UI package with UIController. Moved Menus and HUD classes. Some improvements to taking demage.
If you add images to src/main, copy them to src/test
Merge partially lBerg
Merge stuff
Merge stuff
Merge branch 'master' of github.com:dhbwtd/dhbw-td into mk
changed resource container to handle projectiles