Rewrite README into multimarkdown.  Relatively few changes.
Add some make targets to build the HTMLized README with multimarkdown
and clean stuff up.  Ignore the output.
Use criticmarkup to make the modeline a comment, and not show up in
the final output.
Break this out into multiple lines so vim doesn't complain.
Rewrite CHANGES into multimarkdown.
For the next release, sub-categorize the changes a little, and add one
for the reformatting.
Consistent space between releases.
Double up <>'s around email addresses.  mmd consumes the inner <>'s as
a hint to make it an email/link, so the outers get put through
verbatim, leaving us <em@ail> on the HTML output which looks a lot
nicer than just the bare address.
Call this 'User Visible'.
Actually, put these doc targets down below the reindent.
Whitespace.
Rewrite README and CHANGES into multimarkdown, and add Makefile
targets to generate HTML from them.

As long as I'm rewriting the whole file, make CHANGES go reverse
chronological, and do some random fixups as I went through the file.
For the latest release, add a few subheadings to classify the changes;
don't bother for old ones, I'd be here forever.