Make World instance of KeyListener, MouseListener, MouseWheelListener

... also:
- make Player instance of MouseWheelListener
- changed seperator character for chunk files from "-" to "#" (see "-1--1.chunk" vs. "-1#-1.chunk")
- add debugging information display to frame
- zoom via mouse wheel
Add another test chunk

Located at (-1 | 0). Contains just a few blocks.
Fix #1 (weird displaying of chunks)
Add more debugging features