Added a help button that displays help text in an alert.
Moved the help text into its own view.
Added a gradient background to the help view.
Removed the random image I was using for NoImage.jpg, instead replaced it with a blank file so I can finally add it to the project properly.
Added titles to the main and set pin views.
Prevented the user from being able to avoid specifying a pin by minimizing the app on the change pin view.
Made the set pin view have a title of "Set Pin" when first setting a pin, and "Change Pin" otherwise.