add user_profiles table
- rename "go_players" to "go_games" table
- rename "rengo_players" to "rengo_games" table
- add "demonstration_games" table
- rename games.url to games.sgf_url
- add "go_game_types" table
- remove user_identities.user_identity_id
- remo game_dates.game_date_id
update Teng::Row
update Model