Merge pull request #4 from cocos2d/master

merge
Issue #5624: pluginx - facebook
Issue #5625: fixed a bug about cc._formatString
Fixed #5620: Change logic of cc.audioEngine.end() in JSB
Feature #5592: Add call back to FacebookShareTest
Merge branch 'master' of https://github.com/cocos2d/cocos2d-js
Merge pull request #515 from joshuastray/master

Issue #5618: replace (g|s)etSize with (g|s)etContentSize in UI Test
Merge pull request #519 from VisualSJ/master

Issue #5624: pluginx - facebook
Merge branch 'master' of https://github.com/cocos2d/cocos2d-js
Update the reference of submodule cocos2d-console.
Fixed #5557: Added specific and jsb only API definitions in comment for cocos code ide usage
Update submodules
Merge pull request #521 from natural-law/master

Update the reference of submodule cocos2d-console.
Fixed #5629: Fix buoyancy test issue with unreleased collision handler
and improve all Chipmunk test cases
Issue #5592: Facebook plugin
Merge pull request #520 from pandamicro/master

Improvement and bug fixes
Merge pull request #522 from VisualSJ/master

Issue #5592: Facebook plugin
add provider for facebook sdk