Added missing kgs inclusion.

The commit #9cba578e9105ab15ab20f58179e4563db9786ca9 dropped the
opengever-zug kgs inclusion, which is right, but it dropped the
complete inclusion of the kgs version. The standard opengever
version pinings are necessary.
Merge pull request #236 from 4teamwork/pg_add_misingkgs_inclusion

Added missing kgs inclusion.