Added new update-coverage.py script for an incremental coverage update
Added new update-coverage.py script for an incremental coverage update

thomaskonrad/osm-austria-building-coverage,thomaskonrad/osm-austria-building-coverage,thomaskonrad/osm-austria-building-coverage,thomaskonrad/osm_austria_building_coverage,thomaskonrad/osm_austria_building_coverage,thomaskonrad/osm_austria_building_coverage,thomaskonrad/osm-austria-building-coverage,thomaskonrad/osm_austria_building_coverage