[Inkscape-devel] Color enum purged

Next step in supporting CMYK, etc, was to purge the paint enum type. Take a look to see if things are still holding up.

The main reason is that we're getting to support proper SVG paint, not just the union/enum subset. That is, a paint could have both a URL and a normal color part specified, or a URL, a normal color part *and* an icc-color...