Test various image and formats.
The idea is to decode and encode again an image and
check for differences. ImageMagick is used to create
some test image and compare results.
Wine is used to execute a test helper.
Signed-off-by: Frediano Ziglio <fziglio@redhat.com>
Acked-by: Christophe Fergeau <cfergeau@redhat.com>
