Merge pull request #23 from BinkyToo/cleanup

Cleanup
various graphics pokings - no effect on graphics or gameplay
fire overlay image for cells
Tweaks to text appearance
cosmetic tweaking to dynamite icon
Convert to using big tiles
fixed nonvisible so that minimap is usable
fixed player in trees visibility
fixed bear visibility in trees
centred collectables on cell for 12x12 cells
included xcf for new paving style
12*12 fire graphic
added fire graphic xcf file
castle now has double-thickness walls
player sprite is now an image, cleaned out clunky, unused player animation code
player is now an arrow, representing last move direction
remove noisy debug output
Player arrow diagonal edges fuzzed
Scaled NonVisible image to 12x12 px
Make the unexplored areas Black, reduce the number of bears