fixed player rendering to be on top of everything else

incl. some code formatting optimizations
Merge branch 'dev' of https://github.com/davidbeermann/econarchy into dev
transferred KeyTracker class from demo

and adapted key triggers in actor class accordingly
transferred Sprite class from demo sketch

and implemented it into player - lots of little todo's left
Merge branch 'dev' of https://github.com/davidbeermann/econarchy into dev

Conflicts:
	Econarchy/Actor.pde
	Econarchy/Econarchy.pde
fixed merging errors

note to self: spending $70 for a file diff & merge tool is well worth the money... still tbd: buy Kaleidoscope
Merge branch 'dev' of https://github.com/davidbeermann/econarchy into dev

Conflicts:
	Econarchy/Econarchy.pde
	Econarchy/SoundEvent.pde