OGDCH-175: Parse BGDI WMS service
OGDCH-175: Remove dataset-specific mapping

- It has never been used and it doesn't look like we need it any time
  soon
OGDCH-175: Move mapping to ckan_wms module incl. geocat lookup
OGDCH-175: Change name of the swisstopo license
OGDCH-175: Add csw id command to directy query a geocat id
OGDCH-175: Add swisstopo specific WMS information
OGDCH-175: Handle empty tags for translations
OGDCH-175: Add BAFU organization
OGDCH-175: Add tests for ckan_wms