update releasenotes, new layers ch.swisstopo.swisstlm3d-karte-* refs #4681

git-svn-id: https://svn.bgdi.admin.ch/mf-chsdi/trunk/chsdi@3958 e100092c-b5e6-494f-8bdf-19c1ff2a4001
Merge branch 'svnsync'