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
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
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
Modifying protocol buffers for win32 version
Modifying win32 and wp8 protocol buffers lib
restored cocos/CMakeList.txt
Fix UIButton setFontSize sync ContentSize
Merge branch 'v3' of https://github.com/cocos2d/cocos2d-x into v3

Update from upstream.