#56: Support basic preservation of CZML visual fidelity. This has the following caveats:

 - Points: Only point size and color is preserved
 - Lines: Only line color is preserved
 - Polygons: Only line and fill color is preserved
 - Themes: Only rules with filters defined are preserved. Rules without filters (ie. The default rule) will be ignored.

This gives us some semblance of basic visual preservation for points/lines/areas