fixed bug where program could terminate inside a literal
auto-compute board size from input

prompts are also a bad idea
fixed bug in single-line input files
more sample programs to test
hopefully squashed all remaining bugs with computing size of board
edge jump test code to verify that the toroid-grid works properly, even
in pathological combinations of other commands
a failing test, which will always fail in this implementation

because we use an array of actual characters, and pyton will fail to
coerse an int outside of the [0,255] range into a "dummy char" like
other languages might, this code will throw a fit

the only way to fix this would be completely changing the underlying
storage mechanism, which /can/ be cone, but isn't a short-term goal