章节选择添加退出按钮

Signed-off-by: Zhao Yanxia <1716655706@qq.com>
Merge branch 'master' of https://github.com/Cocos2dxGame/MHE
Merge branch 'master' of https://github.com/Cocos2dxGame/MHE
Merge branch 'master' of https://github.com/Cocos2dxGame/MHE
Merge branch 'master' of https://github.com/Cocos2dxGame/MHE
添加发射音效、修改人物朝向问题

Signed-off-by: Zhao Yanxia <1716655706@qq.com>
Merge branch 'master' of https://github.com/Cocos2dxGame/MHE
斜跳

Signed-off-by: Zhao Yanxia <1716655706@qq.com>
Merge branch 'master' of https://github.com/Cocos2dxGame/MHE

Conflicts:
	Classes/GameScene.cpp