created file for map
does this work?
added init
more initial stuff
began bear, mostly yucky copy/paste in
unlikely to work at all
tweaks, created outline player class
Hack together Map class. Doesn't work yet.
Get game working with new Map class.
Fix explosions.
Tidy up Cell creation.
Rename some images.
Create new file for Bear.

Several bear-related functions still in main.py.
Actually move images, remove old 'bear.py'
Hack ALL the files!
Remove more message stuff, make player transparent.
Pull out (and break) the HUD.
Start moving stuff to World.
Get bears moving in World.
Move exploding to Player.
Fix and re-enable the HUD.
Restore endgame messages.