Merge pull request #448 from htlxyz/master

modify framework
track launch event
fix: track event
CCNode添加接口递归设置CascadeOpacityEnabled
Merge pull request #450 from elisaday/master

CCNode添加接口递归设置CascadeOpacityEnabled
@ scrollView在水平（垂直）滑动的时候不移动垂直（水平）方向
@ 添加UIPanel对象
@ 容错处理
add removeAllItems
add removeAllItems
Merge pull request #454 from yuyangame/patch-2

UIListView add removeAllItems
Merge pull request #453 from elisaday/master

scrollView在水平（垂直）滑动的时候不移动垂直（水平）方向;添加UIPanel对象;容错处理
modify panel