Some #LoupeApp and #GlycinLib updates:

- You can now test GNOME's new default image viewer in GNOME OS https://os.gnome.org/

- Glycin now has a 32 bit CI and build errors on 32 bit have been fixed one more time.

- Glycin now also tests decoding image formats with example images in CI. This will soon be extended to testing correct application of ICC profiles etc.