SVG -> SVGDoc in README
SVG -> SVGDoc in documentation + cleanup
Invoke the property when setting anchor_{x,y}

Without this, _a_x, _a_y end up not being set in the default case,
which causes an AttributeError in SVGDoc.draw().
Set anchor_{x,y} after parsing the SVG, so width/height is known
Merge pull request #2 from lvh/master

Basic examples don't work