OpenCull v0.6.0

• Faces found whichever way up they stand. With Advanced AI on, a
  new face finder spots faces turned sideways or upside down (a child held
  upside down, someone lying on the grass, a photo taken from below) and reads
  their eyes the right way up, so an upside-down face is no longer marked
  down for shut eyes. Upright faces are found a little more often than before,
  and fewer things that are not faces are taken for the people in the photo.
  Basic AI is unchanged.
• Faster face analysis on a Mac. The face finder runs on the Mac's
  graphics chip when that is quicker, and switches back by itself when
  another program is busy on it. Windows and Linux are unchanged.
• A finished card review clears itself. Once its photos are copied and
  opened, the review is no longer offered to resume.

See the README for what works, what does not yet, and how to open the app the first time.