* Modified the layer follow action class to include a horizontal (x) and vertical (y) offset on the screen from which the node is to be followed.
* Added offsetX and offsetY parameters in Follow::clone() method.
* Added test case for follow action with offset.
* Made changes to the test case on follow action with offset.
* Added new createWithOffset function to create a follow action with offset.
* Modified the test case for followWithoffset to use the newly added createWithOffsets function for follow action.
* Refined the code for creating follow action with offsets.
* Modified test case for follow with offset as per updated create method.
* Code refined in createWithOffset method of follow action.
* Refined AppController.mm,RootViewController.mm and HelloWorldScene.cpp to load the cocos2d-x scene more effectively.Also included the procedure to dismiss the game scene and navigate back to iOS screen.
James Chen