Update _bPlaying on CCActionObject.

The method CCActionObject::isPlaying() return the state of the member var _bPlaying,
which is initially declared false and never updated. The change updates this variable
across the play, pause, stop and end states of the action.
call detach method on thread exit
fix warns and memory leak
Merge branch 'v3' of https://github.com/cocos2d/cocos2d-x into v3-win32-warn

Conflicts:
	tests/cpp-tests/Classes/UITest/CocoStudioGUITest/UIButtonTest/UIButtonTest.cpp
mingw64: mirgrate to upstream minizip
fix DrawNode's memory leak -- delete vaos those are generated and forget to release
Merge pull request #8642 from martell/minizip

mingw64: mirgrate to upstream minizip
Fix the lua-tests compile error
Update project setting for Linux and Win32
Merge pull request #8644 from samuele3hu/v3_compile_error

Fix the lua-tests compile error
fix bug that Application::getCurrentLanguageCode on ios and mac always return empty string
fixed compile error
Merge pull request #8543 from Dhilan007/v3-fixwarns

fix warns and memory leak
[AUTO]: updating luabinding automatically
Merge pull request #8649 from CocosRobot/update_lua_bindings_1413015049

[AUTO]: updating luabinding automatically
Merge pull request #8648 from Dhilan007/v3-zipfix

fixed compile error
Merge pull request #8646 from huangshiwu/v3_languagecode

fix bug that Application::getCurrentLanguageCode on ios and mac always r...
[ci skip] Update CHANGELOG
Merge pull request #8577 from ntotani/detach-thread-on-exit

call detach method on thread exit
Merge pull request #8643 from huangshiwu/v3_fixDrawNodebug

fix DrawNode's memory leak -- delete vaos those are generated and forget...