Merge pull request #21 from Ryeeeeee/master

merge wuhao
add  show blood label.
fix bug with follow logic
Merge branch 'master' of https://github.com/Wu-Hao/TankMultiplayer

Conflicts:
	Classes/GameScene.cpp
Fixed Aimer_show bug.
Merge pull request #22 from fusijie/master

add blood label & fixed aimer bug.
add power indicator in enemy's turn
Synchronization
Fixed blood loss bug.
Merge pull request #23 from fusijie/master

Fixed blood loss bug.
Merge branch 'master' of https://github.com/Wu-Hao/TankMultiplayer
added sound effect files
added some images
detects player going outside, raised ceiling of where bullet can go
add angle change
merge wuhao and add effect files
added explosion particles, polished damage indicator and side indicator
add effects
add effects and merge wuhao