Started to rework the new user interface to use a storyboard in the modern style
Continued to rework the new user interface to use a storyboard in the modern style.
The storyboard now has two entry points (old-style and newer-style).
The newer style one is based around a UITabViewController, and will use a universal auto layout when complete.
The old-style is the one currently enabled - the newer style one is WIP at the moment.