Revision 2488

	svgexport: Improved code quality, mainly by better naming.

	* Extensions/svgexport/svgmapwriter.py:
	DrawPath() renamed to DrawPolygonPath(),
	added documentation, improved comments and variable names.

	* Extensions/svgexport/svgmapwriter.py,
	  Extensions/svgexport/test/test_svgmapwriter.py:
	All using DrawPolygonPath() now, the default parameter closed=True
	omitted.

	* Extensions/svgexport/test/test_svgmapwriter.py:
	renamed test_polygon_opened() to test_polyline()
	renamed test_transparent_polygon() to test_transparent_polyline()