Simple 'turtle' library that has a little arrow move around a map on the
terminal. This is to help teach introductory programming. For more visit
http://uepsp.xyz.

Maps have to be 20 characters by 20 character plaintext files(exclusing
newlines) encoded in ascii.

The 'turtle' moves with the go(int) and turn(int) functions. '#' characters in
the map are walls and '$' is the prize.