placement docs touchups
placement docs touchups

CartoDB/mapnik-reference,mojodna/mapnik-reference,florianf/mapnik-reference,mapycz/mapnik-reference,mapycz/mapnik-reference,gravitystorm/mapnik-reference,CartoDB/mapnik-reference,florianf/mapnik-reference,mapnik/mapnik-reference,mapnik/mapnik-reference,mapnik/mapnik-reference,mojodna/mapnik-reference,gravitystorm/mapnik-reference