HUD graphical tweaking, coins replaced by moneybag
Renamed money bag xcf file to fit convention
Replaced chocolate bar image with new (but similar) drawing
more graphics tweaking, new background
minor graphical tweaks
even more tweaks to chocolatebar
New dynamite graphics
Make bear range circular (again).
Sane variable naming (again).
Remove self.pfinitialvalue (won't work well with variable costs).
Make bears consider terrain difficulty (again).

This makes bears avoid forests, which is silly.
Linewrap some overly long conditions.
Create non-hunting Bear.move() function.
Bears wander about if not chasing the player.
Remove assorted trailing whitespaces.