add destructor for physics sprite
update cocos sdk
Merge branch 'master' of github.com:vedi/cocos2d-x

Conflicts:
	cocos2dx/proj.ios/cocos2dx.xcodeproj/project.pbxproj
	extensions/cocos2dx-store
Merge remote-tracking branch 'origin/master'
 Implement in-app purchase refs #1627

  add in-app purchase feature