bfs finding path added
pathfinding add cloest cube
in server, getReward into getRewardPostion
Merge branch 'yifei' of https://github.com/yutongp/RaiseMeUp into ypei
Merge branch 'lucas' of https://github.com/yutongp/RaiseMeUp into ypei
add the camera function
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
Changed information bar position.
fix getRewardCubePositition bug for new object
Merge branch 'yiweili' of https://github.com/yutongp/RaiseMeUp into ypei
Merge branch 'lucas' of https://github.com/yutongp/RaiseMeUp into ypei
Merge branch 'xinbweng' of https://github.com/yutongp/RaiseMeUp into ypei
fix port 80
fig merge bug and typo in render()
world offset considered
delete swipe
Merge branch 'yifei' of https://github.com/yutongp/RaiseMeUp into ypei

Conflicts:
	server/rpc/demo.js
merged with ypei