WIP

title
Reflood from center is now working

will clean up code later today…. but once the mouse reaches center, it
can now get the reversed values to go back to the start cell… and then
over again..
Solver coming together

Works for HITEL01.maz and HITEL02.maz
Added extra mazes, Cleanup code

Added sample mazes… all tests pass, except for SEOUL01.maz, which has a
trap at (2,1), (2,2), (2,3). next_dir should be updated to handle these
cases. Otherwise, solver is looking solid, can solve APEC2002, HITEL01,
HITEL02, and SEOUL02 maze files without any difficulties.
SEOUL01.maz simulation now working

Title
Merge branch 'new-working-on-reverse'