add player api
add token function`
add player functions
-test.html added
Merge commit '5ce9b5aca613bade592e15267a66601352ab286a'
overServlet added
add image servlet.
test.html edited
Merge branch 'master' of https://github.com/nurinamu/multi_galaga
modify enum to static classes.
Merge branch 'master' of github.com:nurinamu/multi_galaga

Conflicts:
	war/test.html
fix typo in json.
UI
Create new player when entering first,
Change RoomStatus 'END' when all player ended a game.
bug fixed
add returning msg by channel api
fix NPE in player
Merge branch 'master' of github.com:nurinamu/multi_galaga
add rank
PlayerInfo, RoomInfo servlet added
EnterServlet return shortened