Issue #5702: Update API
Merge branch 'master' of https://github.com/cocos2d/cocos2d-js
Fixed #5742: Support remote image in cc._imgLoader and cc.textureCache.addImage
Fixed #5742: Improve cc.textureCache.addImage
Issue #5781: Clean up game start up code
Update plugin-x ref for FacebookAgent
Fixed #5760: Improve templates HelloWorld project
Merge branch 'master' of https://github.com/cocos2d/cocos2d-js
Merge branch 'master' of https://github.com/cocos2d/cocos2d-js
Merge pull request #643 from VisualSJ/master

Issue #5702: Update API
Merge pull request #645 from joshuastray/master

issue #5695: fix bugs of facebook testcase
Merge branch 'master' of https://github.com/cocos2d/cocos2d-js
Merge pull request #644 from pandamicro/master

Fixed #5742: Support remote image in cc._imgLoader and cc.textureCache.addImage
Issue #5695: Update Facebook plugin test
Merge pull request #646 from VisualSJ/master

Issue #5695: Update Facebook plugin test
Fixed #5782: Refactored all actions to lower case creation function
Issue #5781: Bind ReverseTime action
Merge branch 'master' of https://github.com/cocos2d/cocos2d-js
Issue #5702: Update API
Merge pull request #648 from VisualSJ/master

Issue #5702: Update API