Change NULL to nullptr, edit hungarian notation.
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into edit_hungarian_notation
revert submodules
fix more code with hungarian notation
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into edit_hungarian_notation
revert AccelerometerSimulation.m
fix compile errors.
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into edit_hungarian_notation
Merge pull request #4534 from boyu0/edit_hungarian_notation

Edit hungarian notation