Implemented Panning

- Controller Added a UIPanGestureRecognizer to the GraphView
- GraphView implemented the handler pan:
Got the iPad Storyboard connected and working correctly
- Now need to implement the UISplitViewDelegate
Implemented the UISplitViewControllerDelegate
Finished Assignment 3 Required parts
- Added the NSUserDefaults Bit
Add the Drawling Line Mode Switch
Added the Table view to add a Favourite button on the iPad Version