Added music
Added a new soundHandler class that plays music. Also when picking up a key
Added sounds for different events in the game.
Added the actual files for the sounds, they were missing in last commit.
Tweaked volumes.
Merged dev-0.4 into devsound and fixed conflicts.
Added a basic usermanual
Merge branch 'devsound' of https://github.com/larsson152/dat255 into devsound
More javadoc, lovely javadoc
Rehauled the scoring, Now more akin to Time Attack where a high score is a bad thing
Merge branch 'devsound' into dev-0.4