class Svg extends Renderer<org.w3c.dom.Document>
Render a Map to an SVG Document.
 import geoscript.render.*
 import geoscript.layer.*
 import geoscript.style.*
 Map map = new Map(layers:[new Shapefile("states.shp")])
 Svg svg = new Svg()
 svg.render(map, new FileOutputStream(new File("states.svg")))