fix encoding for ISO output (#576)
fix encoding for ISO output (#576)

kalxas/pycsw,tomkralidis/pycsw,tomkralidis/pycsw,bukun/pycsw,kalxas/pycsw,ricardogsilva/pycsw,kalxas/pycsw,geopython/pycsw,ricardogsilva/pycsw,geopython/pycsw,bukun/pycsw,tomkralidis/pycsw,geopython/pycsw,ricardogsilva/pycsw,bukun/pycsw