Made increasing and lowering volume slower

To make it more precise
Removed unused import
Lowered the weapon- and powerup limit
Merge branch 'dev_network' into dev
Added Javadoc for various classes
Updated the (main) menu with images (a class should be created for this...)
Merge branch 'dev' of https://github.com/totteCh/B17 into dev
Made the buttons less pixely
Began adding support for multiple game modes
Adde scoreBasedGame as and subclass to GameConditions
Score is checked after each round only
Restructured states, created abstract TanskState

also deleted OldPlay
Made multiple winners possible
Made multiple winners possible

Accidentaly separated commits.
Bugfixes
Updated buttons, the text might be too big
Added endRound to GameConditions
scoreBasedGame uses endRound

Also minor changes for testing
Changed the texts position after game over.
Lowered health for testing purposes