TodoList - Import MOVE class from Jo's GitHub

- Copied MOVE class from https://github.com/joalbright/Move
TodoList - Adding swipe gesture support

- Can now move items left and right.
TodoList - Non functional changes.

- Updating text of default list entries (for screen grabs)
- Removing no longer desired methods canEditRowAtIndexPath and
commitEditingStyle
TodoList - StrikeThrough support

- Updating TableCell to have a strikeThrough property of type UIView so
that instead of using a UILabel’s attributedText property to create
strike through text, we just draw a line of the desired length over the
text.
- When the user selects a cell, we apply this strike through effect via
the VC’s didSelectRowAtIndexPath method.
TodoList - Removing cell dictionary object property

- Adding placeholder text for the input item
- No longer use a Dictionary object property to help set the cell’s
text. Instead the nameLabel is directly accessed by the ViewController.