fixed cc.pGetAngle not using absolute value
On activity result listener added
it is strongly need fro most extensions like Game Center and In app billing
merge error fix
isActivityVisible method
Fix possible memory leak
issue #4783, add outline shader files
closed #4783. finish the shading effects
closed #4783. remove unused comments in shader file
closed #4783. replace deprecated function call
Fix for issue http://www.cocos2d-x.org/issues/4880.
Update LICENSE_cocos2d-x.txt
Merge pull request #6093 from dplusic/develop

fixed cc.pGetAngle not using absolute value
Merge pull request #6270 from andyque/feature4783

closed #4783, add outline shader files
Merge pull request #6154 from newnon/develop_jni_improvements

[android] Adds onActivityResult listeners
Merge pull request #6260 from iSevenDays/patch-8

Fix possible memory leak in Image::saveImageToPNG
Merge pull request #6302 from zifter/FixParticle

closed #4880: Particle systems loading incorrectly in CocosBuilder
Merge pull request #6 from cocos2d/develop

合并Develop