add simple WKT round-trip test (required updated data)
add simple WKT round-trip test (required updated data)

mapnik/mapnik,mapnik/mapnik,mapnik/mapnik,lightmare/mapnik,naturalatlas/mapnik,naturalatlas/mapnik,lightmare/mapnik,tomhughes/mapnik,naturalatlas/mapnik,tomhughes/mapnik,naturalatlas/mapnik,lightmare/mapnik,tomhughes/mapnik,lightmare/mapnik,mapnik/mapnik,tomhughes/mapnik