Ensure that an error is raised when something is placed in an
already-occupied spot
Now saving Game in db with each change to board.  Changed tests as they
began to fail as soon as update_board began to return 'true' with a
successful save
(m) fixed spacing
Merge pull request #4 from cowmanifestation/master

Raise error when something is entered into a full spot on board. Save game in db when board is updated