changed to using system fonts
font now a variable
Use Dejavu Sans by default, allow non-default font/size as draw argument
fixed typo
moved docstring back into correct place
Added docstrings
Map initiation is now a function, as is coin counting
new small maps, better debug output for terrain type changes
tweaked-a-bear
fixed coin colour in small map
Returned to using World7
Allowed continous travel off edges
Deleted old, usused code
changed alignment, convenient comment-outable lines for different worlds
tile images are now available from a seperate file
Test use of images.py
tweaked indentation of comments
misc cleanup
Added missing docstrings
changed error behaviour (consistent now, but could be done better)