Solve the crash in WebSocketTest when the network in disconnected.
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into develop
closed #4150:  fix physics position/rotation tag bug.
Merge pull request #5589 from natural-law/develop

Solve the crash in WebSocketTest when the network in disconnected.
check validation of ndk_root
Merge pull request #5594 from minggo/install

check validation of ndk_root
Fixes 'schedule test/issue#2268' crashes
Merge pull request #5593 from boyu0/iss4159_physics_position_rotation_bug

closed #4159:  fix physics position/rotation tag bug.
closed #4291：open CCEditBox as modal dialog
Merge pull request #5597 from koowolf/editbox_dialog

closed #4291：open CCEditBox as dialogbox
Update CHANGELOG [ci skip]
Merge pull request #5595 from dumganhar/schedule-test-crash

Fix of  'schedule test/issue#2268' crashes
small setup.py fixes
Merge pull request #5599 from ricardoquesada/setup_fixe

small setup.py fixes
fixes for linux
Merge pull request #5600 from ricardoquesada/setup_fixes

fixes for linux