Release gnome-epub-thumbnailer 1.8-1 to unstable
tagging package gnome-epub-thumbnailer version debian/1.7-4
tagging package gnome-epub-thumbnailer version debian/1.7-3
tagging package gnome-epub-thumbnailer version debian/1.7-2
tagging package gnome-epub-thumbnailer version debian/1.7-1
tagging package gnome-epub-thumbnailer version debian/1.6-2
tagging package gnome-epub-thumbnailer version debian/1.6-1