RMSwipeTableViewCellAnimationTypes now match UIViewAnimationOptions
• Improved the cell's delegate methods. It now returns the actual `CGPoint` (the contentView's minX) based on whether `panElasticity` is set to TRUE. I also improved the language used for the delegate methods, which means I have deprecated the old ones.
• This also means I have updated the demo. And I managed to find some logic issues with the demo cell subclass and controller, which incidentally prompted the delegate and panOffset usage above, so it should now function much better. I also updated a bit of the UI for the demo with some nicer animations.
• Lastly, I added the ability to output all the values from the delegate methods in the demo by setting LOG_DELEGATE_METHODS to TRUE (#define the top of `RMSwipeTableViewController.m`).
Fix #7