minor tweaks...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
fixed bug -- now marks/tags/bookmarks are maintained in correct order while shifting images left/right...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
added %(..)b to exporting + some tweaking...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>