Closed #3371: adding cc._PointConst and cc._SizeConst to engine for better Performance.
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into Iss3371_xxxConst

Conflicts:
	extensions/CocoStudio/GUI/UIWidgets/UIButton.js
	extensions/CocoStudio/GUI/UIWidgets/UIImageView.js
	extensions/CocoStudio/GUI/UIWidgets/UILoadingBar.js
	extensions/CocoStudio/GUI/UIWidgets/UISlider.js
	extensions/GUI/CCControlExtension/CCControlSwitch.js
Fixed #3371: remove "ie" from cc.Browser.webglWhiteList
issue #3419 add play several movement for armature
issue #3419 add changeDisplayByName for bone
issue #3419 refactor callMovementEvent
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into Iss3371_xxxConst
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into Iss3371_xxxConst
issue #3419 change update blendType
issue #3419 add  calculated vertex
issue #3419 change tween function
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into develop_20131218
issue #3419 set default value for isTween
Issue #3371: replace types of cc.Node's anchorPoint, anchorPointInPoint and Position from cc.Point to cc._PointConst
issue #3419  transform bug
issue #3419 change animation play
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into develop_20131218
Merge pull request #1327 from xingsenma/develop_20131218

issue #3419 update armature to v2.2.2
Fixed #3363 : Added clip mode in Canvas

Clip mode support cc.DrawNode which is used in CocosStudio, the clip
mode is more efficient way for ClippingNode. But it doesn’t support
recusive stencil
Reformat code in CCClippingNode.js