update documentation
update documentation

mwengren/pycsw,bukun/pycsw,kevinpdavies/pycsw,ingenieroariel/pycsw,bukun/pycsw,benhowell/pycsw,rouault/pycsw,ocefpaf/pycsw,ricardogsilva/pycsw,PublicaMundi/pycsw,kevinpdavies/pycsw,benhowell/pycsw,geopython/pycsw,ingenieroariel/pycsw,PublicaMundi/pycsw,ckan-fcd/pycsw-fcd,tomkralidis/pycsw,ricardogsilva/pycsw,kalxas/pycsw,ocefpaf/pycsw,kalxas/pycsw,rouault/pycsw,ckan-fcd/pycsw-fcd,ricardogsilva/pycsw,mwengren/pycsw,geopython/pycsw,tomkralidis/pycsw,kalxas/pycsw,bukun/pycsw,tomkralidis/pycsw,geopython/pycsw