bfs finding path added
pathfinding add cloest cube
in server, getReward into getRewardPostion
Merge branch 'yifei' of https://github.com/yutongp/RaiseMeUp into ypei
Add gesture functionalities
Merge branch 'lucas' of https://github.com/yutongp/RaiseMeUp into ypei
add reward in client side; fix bug with worldMap that ignore waterPosition
Merge branch 'yiweili' of https://github.com/yutongp/RaiseMeUp into ypei

Conflicts:
	client/code/app/game_client.js
update the waterPosition