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.
use fileName for _actionDic key
SceneReader sets contentSize by canvasSize.

We could not get the canvas size of the scene which created on CocosStudio.

Thanks to this commit, we can get scene's canvas size by Node::getContentSize()

```cpp
auto scene = cocos2d::cocostudio::SceneReader::getInstance()->createNodeWithSceneFile("Scene.json");
int width = scene->getContentSize().width;
int height = scene->getContentSize().height;
cocos2d::log("canvasSize = %d, %d", width, height);
```
Sprite3DTest.lua:
Add Sprite3DWithSkinTest
Add AttachmentTest
Add Sprite3DReskinTest
Add Sprite3DMirrorTest
Add Sprite3DHitTest
Finished Sprite3DHitTest
Sprite3DHitTest use BoundingBox
Scale9Sprite capInsets set fix
Remove string err no used
added  LuaStack::loadChunksFromZIP()
call detach method on thread exit
fix endless loop when dimensions that are not enough to fit one character
Fixed LabelAtlas opacity do not change when setting parent node's opacity
modified project files and make files
modify return type of getDirection and getDirectionInWorld
Merge pull request #135 from lvlonggame/v3

Remove string err that is no used
Merge branch 'v3_new' into v3

Conflicts:
	tests/lua-tests/src/Sprite3DTest/Sprite3DTest.lua
Fixed getCosOuterAngle errors
Merge branch 'newcode' into v3
Merge branch 'v3' of https://github.com/super626/cocos2d-x into v3