Replace Imakefile with a configure script.

Better error handling.

Resource and command-line option to specify font path.

Resource to specify name of environment variable from which to get the
font path.

Have character substitutions (currently done in draw.c:FakeCharacter)
specified in a resource (similar format to FontMap).

The initial width of the dialog box should expand to accommodate the
default value.

Option in Print dialog to specify that only the current page should be
printed.
