Format and URL fix 2004/gavare

Format fix README.md.

Add humour heading (as 'humor' as the author spelt it wrong :-) :-) )
instead of what was a '<humor>..</humor>'. This due this is not valid
html (guess why! :-) ) and so would not show up right in GitHub (or in
any other html document). Using a '### ...' seemed better than escaping
the <>s.

Dead link. Found new one via the Internet Wayback Machine.

winners.html

@@ -498,7 +498,7 @@ Contest </I></FONT></CENTER><BR>
 <!--  G  G  G  G  G  G  G  G  G  G  G  G  G  G  G  G  G  G  G  G  G  G  G - -->
 
 <UL>
-<LI TYPE=none><A NAME="Anders_Gavare"></A><B><a href="&#x6D;&#x61;&#105;&#x6C;&#116;&#111;&#58;&#x6D;&#100;1&#103;&#x61;&#x76;&#97;&#110;&#64;&#x6D;&#x64;&#x73;&#116;u&#100;&#x2E;&#99;&#x68;&#x61;&#x6C;&#109;&#x65;&#x72;&#x73;&#46;&#x73;&#x65;">Anders Gavare</a></B> -- <A HREF="http://www.mdstud.chalmers.se/~md1gavan/">http://www.mdstud.chalmers.se/~md1gavan/</a>
+<LI TYPE=none><A NAME="Anders_Gavare"></A><B><a href="&#x6D;&#x61;&#105;&#x6C;&#116;&#111;&#58;&#x6D;&#100;1&#103;&#x61;&#x76;&#97;&#110;&#64;&#x6D;&#x64;&#x73;&#116;u&#100;&#x2E;&#99;&#x68;&#x61;&#x6C;&#109;&#x65;&#x72;&#x73;&#46;&#x73;&#x65;">Anders Gavare</a></B> -- <A HREF="https://gavare.se">https://gavare.se</a>
 <UL>
 <LI TYPE=square>Best use of Light and Spheres (<A HREF="years.html#2004_gavare">2004 gavare</A>)
 </UL><BR>