added Node::getCascadeBoundingBox()
replaced "NULL" with "nullptr"
moved getCascadeBoundingBox() to utils
call getCascadeBoundingBox() properly
Merge pull request #1 from cocos2d/v3

- fastforward
* added default value for _batchNode in CCSprite
Merge pull request #8119 from SmartCat/v3

* added default value for _batchNode in CCSprite
[AUTO][ci skip]: updating cocos2dx_files.json
Merge pull request #8121 from CocosRobot/update_cocosfiles_1411435563

[AUTO][ci skip]: updating cocos2dx_files.json
uncomment 3rd part bins check
Merge pull request #8101 from SunLightJuly/get_cascade_bounding_box

added utils::getCascadeBoundingBox()
[ci skip]
Merge pull request #8122 from andyque/fixJenkins

uncomment 3rd part bins check
Add audio resource.
Merge pull request #8124 from Dhilan007/v3-res

Add audio resource.
update submodule
Merge pull request #8126 from minggo/v3

update submodule