SVG rendering support

[truedat101]

The goal is true spatial rendering rather than using Canvas.

Pipeline is

SVG - > SpaceSVG library - > Parse - > Generate Render Mesh

[truedat101]

This is in. Need to test with a few things found in the wild and then mark complete.

[truedat101]

Here are some files to test: https://dev.w3.org/SVG/tools/svgweb/samples/svg-files/