Makefont.c probably needs a little work to be perfectly portable.
Shouldn't be too hard. Use of "5555" to mean "use the default" is
a little weird, but it works.

Beware of the width information on the letter "J" in the roman triplex
Hershey font. Our copy, at least, was messed up.

It would be nice if someone put out a modified Hershey font that used
the filled-area capability of fonts in vplot.
