弹窗嵌套创建bug修复

1.添加updataUI()方法
2.添加基类BaseNode :pop有两种对象 BaseLayer    BaseNode
Merge branch 'master' of https://github.com/sadanwawa/Eliminating-the-ball

Conflicts:

EliminationBalls/proj.ios/EliminationBalls.xcodeproj/project.xcworkspace
/xcuserdata/yingchen.xcuserdatad/UserInterfaceState.xcuserstate