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);
```
fix cmakelists.txt of linux platform
Merge branch 'v3' into fixLinuxCompileError
add box2d tinyzml back
fix linux compile error
added ClippingRegionNode
standardized codes
remove '../' at path on android.

because AAssetManager_open do not support '../' in path.
use reference
fix bug: physics crashes when remove/add children too quick.
Scale9Sprite capInsets set fix
[AUTO][ci skip]: updating cocos2dx_files.json
Merge pull request #8570 from CocosRobot/update_cocosfiles_1412732478

[AUTO][ci skip]: updating cocos2dx_files.json
Merge pull request #8209 from boyu0/fix_physics_crash

fix bug: physics crashes when remove/add children too quick.
[ci skip] Update CHANGELOG
Update the reference of submodule cocos2d-console.
Merge pull request #8574 from natural-law/v3

Update the reference of submodule cocos2d-console.
delete tip when reload file is empty(it's normal)