add leaflet based viewer (first pass, not ready, but terrified to lose it)
add leaflet based viewer (first pass, not ready, but terrified to lose it)

geopython/demo.pycsw.org,geopython/demo.pycsw.org,murrayk/demo.pycsw.org,geopython/demo.pycsw.org,murrayk/demo.pycsw.org,murrayk/demo.pycsw.org