add pages in manage system

[BohanHsu]

1. Add a login page in manage system. Only login as admin can have access to manage game pages.
2. not sure how easy or difficult to add access control in manage system, but we definitely need to login as an admin to control the game.
3. Add a add game page. there is a btn in games page without function now.
4. this is for make the game a real game. -- game should record player action when playing and persist the result. After the game were played it can no longer be start again and not shows in player page game list. -- we can add some further stats in manage system about game if needed.