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.
added ClippingRegionNode
standardized codes
remove '../' at path on android.

because AAssetManager_open do not support '../' in path.
use reference
call detach method on thread exit
fix warns and memory leak
Add protocolbuf.a
no message
Feature #4977: Fix an issue about checkUpdate function
1. Modifying UIScale9Sprite
2. Updating UI Test
3. Updatding resource of ActionTimeline
Modifying libprotocolbuf.a as protocolbuffer.a
Delete libprotobuf.a
use shader without light by default
Merge branch 'v3' of https://github.com/cocos2d/cocos2d-x into v3-win32-warn

Conflicts:
	tests/cpp-tests/Classes/UITest/CocoStudioGUITest/UIButtonTest/UIButtonTest.cpp
add test case for staggered map
create animate by frame section.
add a param comment
add staggered wrapper(using ortho for its implementation now)
modified project files and make files