doxygen config needs and update for F20

[Derek Atkins]

Hi,

I've set up the new code server to build the docs, and it has the
following output.  I suspect we'll need to update the config, whch I
will happily get to eventually unless someone else get to it first.

-derek

 **Unmatched Entries**
 CMDOUT (Warning: Tag `SYMBOL_CACHE_SIZE' at line 278 of file doxygen.cfg has become obsolete.)
 CMDOUT (To avoid this warning please remove this line from your configuration file or upgrade it using "doxygen -u")
 CMDOUT (Warning: Tag `SHOW_DIRECTORIES' at line 462 of file doxygen.cfg has become obsolete.)
 CMDOUT (To avoid this warning please remove this line from your configuration file or upgrade it using "doxygen -u")
 CMDOUT (Warning: Tag `HTML_ALIGN_MEMBERS' at line 788 of file doxygen.cfg has become obsolete.)
 CMDOUT (To avoid this warning please remove this line from your configuration file or upgrade it using "doxygen -u")
 CMDOUT (Warning: doxygen no longer ships with the FreeSans font.)
 CMDOUT (You may want to clear or change DOT_FONTNAME.)
 CMDOUT (Otherwise you run the risk that the wrong font is being used for dot generated graphs.)

-- 
       Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
       Member, MIT Student Information Processing Board  (SIPB)
       URL: http://web.mit.edu/warlord/    PP-ASEL-IA     N1NWH
       warlord at MIT.EDU                        PGP key available