I guess we could have variables for the page header and footer that
will be inserted there, with place holders for author name, date, and
title. This is a relative minor change. The menu across the page
could go in there, but I would suspect that you need to put this into
the header format yourself.
Another possibility would be to put the header and footer information
into a special section of the outline in the file, for example
* COMMENT html configuration
** Header
here the header HTML code which will be inlined into the exported
file
** Footer
here the footer HTML code which will be inlined into the exported
file