Add practice mode answer time logging.
Fix question generation in practice mode.

Use a uniform distribution rather than some hyperbolic... thing.
Log random generator step in practice mode.
Storing options in the database.
Use conf settings in practice mode.

Also, the proportion input widget now limits the accepted inputs to
those that are possible with current settings.
Rudimentary configuration menu.
Tweaks.
Functional configuration panel and more options.
Image mode layout, loading, scrolling and zooming.
Working image mode.