Add vdatum 4.4.1 to supported list
add instructions on adding vdatum version to vdatum_validation
eliminate some tests that were reliant on a particular vdatum region existing (failed with new vdatum where that region was removed)
vertical_datum_to_wkt will work with ellipsoid datum_identifier and no vdatum
allow for building vdatum core object with invalid vdatum path to support core utilities
Add vdatum 4.4.1 to supported list add instructions on adding vdatum version to vdatum_validation eliminate some tests that were reliant on a particular vdatum region existing (failed with new vdatum where that region was removed) vertical_datum_to_wkt will work with ellipsoid datum_identifier and no vdatum allow for building vdatum core object with invalid vdatum path to support core utilities