* doc/Makefile.am (EXTRA_DIST): Add mainpage.dox.
* doc/Doxyfile.in (INPUT): Add @srcdir@/mainpage.dox

* src/ltlvisit/tostring.hh (to_string): Add doxygen comments.
* src/ltlast/multop.hh (multop::paircmp): Add doxygen comments.
* src/ltlvisit/postfix.hh: Typo.

or configure.ac changes.  Distribute the html doc.
* doc/Doxyfile.in (EXCLUDE_PATTERNS): Complete with
useless Bison classes.
(FILE_PATTERNS): Remove *.cc files.

* doc/Makefile.am, doc/Doxyfile.in: New files.
* Makefile.am (SUBDIRS): Add doc.