geos-xml-viewer has duplicated functionalities that were already developed in geos-xml-tools to handle XML files. To do that, multiple steps are required: - Remove non related XML handling tools from geos-xml-viewer - Incorporate new features from geos-xml-viewer inside geos-xml-tools - Clean the new features to make sure they are using already existing functions from geos-xml-tools - Update geos-xml-tools documentation and create tests - Update the ParaView plugin called deckReader - Move deckReader as PVGeosDeckReader to the geos-pv package - Remove geos-xml-viewer