Rendering GML polygons with OpenLayers.
Adapted from: http://openlayers.org/dev/examples/gml-layer.html
-- added <styles> section to index.html and removed links to remote css.
-- removed <body> content, except for the map.How it works:
-- creates an OpenLayers.Map
-- adds an OpenLayers.Layer.WMS (uses OSGeo WMS)
-- adds an OpenLayers.Layer.Vector (reads polygons from local GML file)