* modify ip to connect remote svr
* 2 players join into the game
* fix bug: show/hide crown for robot
Merge branch 'remoteSvr' into twoPlayers
* modify scenes show order
* add room id label
* hide EmployRolePanel automatically
* fix bug: do not show select role mark
* fix bug; open bgMusic
* add realPlayerNum
* add countdown for players
* show countdown for other players
+ add CountdownBoard
* add countdown for player's action
* change bg picture
+ add ArrowAnimation
* modify CountdownBoard Z order
* fix bug: MagicAnimation
* optimize code for mActionRoleMarkSprite
* fix bug: MagicAnimation & ArrowAnimation can't use the same var