issue #2771: add physics files and entries.
issue #2771: add Node::_physicsBody to Node init list
issue #2771: add new line to the end of line.
issue #2771: Change _physicsBody from node to sprite. Reimplement Scene::addChild. Adjust some API.
issue #2771: Fix CI compile errors.
issue #2771: Fix CI compile errors.
issue #2771: Fix CI compile errors.
issue #2771: Add macros to control use physics engine or not
issue #2771:  Change CC_USE_PHYSICS_ENGINE to CC_USE_PHYSICS. Add some implements.
issue #2771:  Add method Scene::createWithPhysics() end Scene::initWithPhysics()
issue #2771:  Add PhysicsTest to TestCpp. Add initTest to TestScene, move Scene::init() from constructor to TestScene::initTest()
Disable log output on release build
Issue:Resolve the carsh of the simple game test sample and modify the main.cpps in the template for  the android projects
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into developTest

Conflicts:
	samples/Cpp/SimpleGame/Classes/HelloWorldScene.cpp
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into developTest
Merge pull request #3620 from samuele3hu/developTest

Develop test
upstream synchronize
Merge pull request #3621 from minggo/develop

upstream synchronize
[GUI] Fixing compilation errors for win32.

Conflicts:
	extensions/proj.win32/libExtensions.vcxproj.filters
[GUI] Fix compilation error on win32.