Merge pull request #57 from rongierlach/index_migration

added index to migrations, updated bad tests in model_spec and games_con...
Merge pull request #58 from rongierlach/index_migration

forgot the migration
Added ajax call and merged js files
Merge pull request #59 from rongierlach/TheOneAjax

Added ajax call and merged js files
Validates chains with existing tiles in main chain
ajax back in
updated tests for game and playergame models