pacman: Adjust map size to power of 2
pacman: Add separate dots layer
Remove bmp file generated by bmp2raw

It's a proof file, not directly used as game data.
pacman: Move setup code into separate functions

Don't let the setup() function balloon out of control.
Add SPRITE_Z register def
pacman: Enable sprites

Still no gameplay though...
pacman: Move resource loading into its own file
pacman: Print memory usage info