fixed BatchNode's _children is empty, draw will crash
hot fix:Repair the crash of cocostudio and the bug of some lua test samples can't come in
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into developCCS
Update the JS binding code & samples for latest cocos2d engine.
fix keypad test crash bug
Merge pull request #4294 from natural-law/develop

[ci skip]Update the JS binding code & samples for latest cocos2d engine.
Merge pull request #4298 from boyu0/fix_keypadtest_crash

[ci skip]fix keypad test crash bug
Merge pull request #4293 from 2youyouo2/develop

[ci skip]fixed BatchNode's _children is empty, draw will crash
Merge pull request #4295 from samuele3hu/developCCS

[ci skip]hot fix:Repair the crash of cocostudio and the bug of some lua test samples can't come in
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into developTableView