Added pickaxe.

Added a pickaxe with placeholder image to account for the rare chance of
stairs being in disconnected rooms.
Added minimap.

Added a minimap that shows where you've explorer (movement or pickaxe
usage shows a 5x5 area). Doors are red, ladders are green.
Implemented fullscreen.

Added a fullscreen key (F11) and made the map start black not
transparent.
Compiled jar.

Game version is now alpha 3.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	Roguelike/src/org/tilegames/hexicube/topdownproto/Game.java
	Roguelike/src/org/tilegames/hexicube/topdownproto/entity/EntityPlayer.java
avoid recreating texture on every redraw
use key names