Fix tagged layers not working on indexed images (closes #51)
Fix tagged layers not working on indexed images (closes #51)

Because GIMP does not currently support layer groups for indexed images,
 inserting tagged layers internally in a group and then merging the
group did not work. This is fixed by inserting tagged layers directly in
 the image (applies to all image types, not just indexed).

khalim19/gimp-plugin-export-layers,khalim19/gimp-plugin-export-layers