add comments to setup.py
add comments to setup.py

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