* Fixed: an animated GIF as a background could freeze the clock the moment it
  started. A show of one image no longer decodes the file again every time it
  loops, and a GIF too large to play is shown as its first frame.
* The home-screen button now opens the settings, with a button there to start
  the clock — the one door nothing you import can shut. A switch gives the
  direct start back.
* If the clock ever stops answering, the next start leaves your images and
  imported fonts out and tells you why.
* Every start shows the bare clock for a few seconds before any image, so a
  long press always gets through; and a moving picture that costs more than the
  phone can afford freezes where it is while the clock keeps ticking.
