Grid setProjection2D fix

It doesn't multiply it by the CC_CONTENT_SCALE_FACTOR().
Not needed since it is CCDirector::getWinSizeInPixels() already has it
calculated
pointQuery first returns invalid instance of Shape

Signed-off-by: Shuja Shabandri <shuja@shabandri.com>
Merge pull request #2584 from smshuja/master

fixed #2179: pointQueryFirst returns invalid Shape when a shape is not found.
Update AUTHORS [ci skip]
Merge pull request #2578 from ricardoquesada/grid_projection_fix

Grid setProjection2D fix
Merge branch 'master' of https://github.com/cocos2d/cocos2d-x into Quick-cocos2d-x