Fix a texture problem when loading PVR image

Fix a bug which causes current texture changed when loading a PVR image with GLStateCache enabled.
remove Clear Stencil to avoid double clear of ClippingNode(clear will discard buffer masks on some android device)
Merge branch 'v2' of https://github.com/cocos2d/cocos2d-x into v2
Optimize FPS control algorithm under Android.
Fix the default value for project creator's script
Merge pull request #7596 from timotei/v2

Fix the default value for project creator's script
Merge pull request #7547 from dabingnn/cocos2.2.5

remove Clear Stencil
[ci skip]
Merge pull request #7583 from reckhou/v2

Optimize FPS control algorithm under Android.
[ci skip]
Merge branch 'v2' of https://github.com/cocos2d/cocos2d-x into v2
init widget properties
Merge pull request #7647 from 2youyouo2/v2

init widget properties
Clear bad smell code of android fps control.
fixed CCArmatureAnimation::setSpeedScale
Merge pull request #7809 from 2youyouo2/v2

fixed CCArmatureAnimation::setSpeedScale
Merge pull request #7803 from ggggamer/v2

Clear bad smell code of android fps control.
remove cascade color for ColorFrame
Merge pull request #7826 from 2youyouo2/v2

remove cascade color for ColorFrame
Merge pull request #7164 from billtt/v2_fixPVRLoad

Fix a texture problem when loading PVR image