Add History class and specs
Restructure Runner to record elements of game history as they are created
Add PGWrapper class and specs
Modify Runner specs to finish rebase with master
Modify PGWrapper to use one-to-many relationship between a game and its moves
Refactor PGWrapper
Add read game histories functionality to PGWrapper
Rework system so token colors are only a presentational element
Add perist method to History and have Runner call this rather than needing to interact directly with the database interface; refactor PGWrapper specs
Add Rake tasks to create/destroy tables; remove create_tables_if_needed from PGWrapper
Rename to tic_tac_toes; update readme and gemspec