random cube color for player
Refactor the addVoxel function
Refactor the addVoxel method.
And change the socket communication message when to add Voxel.
Add the argument of color to the addVoxel method
add room control in server and add channel communication
players have diff

Merge branch 'yiweili' of https://github.com/yutongp/RaiseMeUp into ypei

Conflicts:
	client/code/app/game_client.js
rewardgNEREATORE and rewardnum updataed
Merge branch 'yifei' of https://github.com/yutongp/RaiseMeUp into ypei
merge with yifei
bug fixed
add require reward channel
Merge branch 'yifei' of https://github.com/yutongp/RaiseMeUp into ypei
refine code struct
Merge branch 'xinbweng' of https://github.com/yutongp/RaiseMeUp into ypei

Conflicts:
	client/code/app/game_client.js
fix miss delete playName roomNum
add blockLeft
add init blocks num to client
Added player names with color.