Recognize 'white' as a color
Shell out to fc-match to find font files

Regression: we don't recognize "family-weight" or "family-weight-style"
syntax supported by MagicPoint, but we do recognize "family:style" that
is supported by MagicPoint with Xft2.
mgp2pdf -v shows font mappings
Handle "family-weight-slant" style of font specifiers

This festores compatibility with font names that were accepted by mgp2pdf 0.9

Specifically, I need support for "verdana", "verdana-bold",
"verdana-medium-i", "andale mono".