[3.0 Release] Add Changelog
Merge pull request #2242 from dingpinglv/develop

Adds setTargetDensityDPI/getTargetDensityDPI to cc.view.
[3.0 Release] Improve Changelog
Merge pull request #2241 from pandamicro/develop

[3.0 Release] Add Changelog
Fixed a bug of cc.Layer for bake
Merge branch 'develop' of git://github.com/cocos2d/cocos2d-html5 into develop