Suppress gdk-pixbuf assersion on processing some GIF images, reported by
@ttdoda
Merge branch 'master' into fix-suppress-gdk-pixbuf-assersion
Merge branch 'fix-suppress-gdk-pixbuf-assersion' into release-1.2
Bump version
Merge branch 'release-1.2'
Update README and ChangeLog
Merge branch 'release-1.2'
Merge branch 'master' into develop