Wrote unit test (failing) for issue #  -- our first unit test of battle system. It required adding an option for battle system to skip animation (pass in frame rate = 0), a way to query current command name, and a way to get the last message shown. These will all make future battle system unit testing much easier.
Issue #53 - REPEAT command now checks if you have sufficient MP for your spells, will show an error msg if you can't re-cast them.