Merge pull request #94 from pandamicro/master

Issue #4294: Fix bug in Cocostudio test and DoubleSprite test
Issue #4277: update Cocos2d-console's reference
Merge branch 'master' of https://github.com/cocos2d/cocos2d-js into Iss4277_ReleaseV3.0
issue #4221 Correct gui constant
Merge pull request #95 from dingpinglv/Iss4277_ReleaseV3.0

Issue #4277: update Cocos2d-console's reference
Merge pull request #96 from xingsenma/master

issue #4221 Correct gui constant
Feature #4010: Add retina display functions
Feature #4010: Make isRetinaEnabled check more realistic
Merge branches 'master' and 'master' of https://github.com/cocos2d/cocos2d-js
update submodule
Merge pull request #98 from lihex/master

update submodule
Update Cocos2d-html5
Merge branch 'master' of https://github.com/cocos2d/cocos2d-js