cocos2d 添加 原生得空间的类：CCUIViewWrapper 的用法

UIView *myView = [[[UIView alloc] init] autorelease];
CCUIViewWrapper *wrapper = [CCUIViewWrapper wrapperForUIView:myView];
wrapper.contentSize = CGSizeMake(320, 160);
wrapper.position = ccp(64,64);
[self addChild:wrapper];

// cleanup
[self removeChild:wrapper cleanup:true];
wrapper = nil;