This separates the markers (that are in the image atlas marker.svg)
into independent images.

Change-Id: I5de6ee7d5a6ecdaae862d1f3785a552839a04ff6
Reviewed-on: https://gerrit.libreoffice.org/31963Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>
Tested-by: Tomaž Vajngerl <quikee@gmail.com>