[afc] Add thumbnails for Photos in /DCIM
[afc] Add thumbnails for Photos in /DCIM

Photos taken using the iPhone or iPod touch will be thumbnailed
by the device, on-disk, so try to use those instead of letting
the computer download the whole file for it.

Make sure we only process non-hidden files inside the DCIM
directory, to avoid unnecessary checks.

https://bugzilla.gnome.org/show_bug.cgi?id=597804

halfline/gvfs,xkahn/gvfs-cmis,gicmo/gvfs,gicmo/gvfs,halfline/gvfs,xkahn/gvfs-cmis,cpatulea/gvfs,gicmo/gvfs,cpatulea/gvfs,philipl/gvfs,philipl/gvfs,halfline/gvfs,xkahn/gvfs-cmis,gicmo/gvfs,philipl/gvfs,xkahn/gvfs-cmis