fix font render blur
make them public;
add relative position for CCNode;
Merge branch 'relativePosition' into allInOne
fix jpg for iOS;
Merge branch 'Jpg' into allInOne
Merge branch 'fix_font_blur' of https://github.com/dualface/cocos2d-x into allInOne

Conflicts:
	cocos2dx/platform/win32/CCImage.cpp