Merge pull request #1797 from pandamicro/v2.x

Improve change log of v2.2.3
Issue #4926: fixed a bugs of TextureCache that it can't remove the event handler of image
Merge branch 'v2.x' of https://github.com/cocos2d/cocos2d-html5 into Iss4926_Particle
Merge pull request #1800 from dingpinglv/Iss4926_Particle

Issue #4926: fixed a bugs of TextureCache that it can't remove the event handler of image
Closed #4930: Fixed a bug of ccs.UILayer that it can't set _swallowTouche value
Merge branch 'v2.x' of https://github.com/cocos2d/cocos2d-html5 into Iss4930_UILayer
Merge pull request #1802 from dingpinglv/Iss4930_UILayer

Closed #4930: Fixed a bug of ccs.UILayer that it can't set _swallowTouche value
Fix chipmunk typo issue
Merge branch 'v2.x' of git://github.com/cocos2d/cocos2d-html5 into v2.x