When application minimized applicationDidEnterBackground() called, when restored applicationWillEnterForeground().
Also break; forgotten in WM_KEYDOWN.
1 call CCTextureCache::purgeSharedTextureCache() to release cached texture when enableRetinaDisplay is called.
2 enableRetinaDisplay performence correctly.
3 Modify libcocos2d project pre-link event performence corretly when the source in the path which contain white blacks.
4 Modify HiResTest, that can switch resouce dynamicly now.