Mass typo fix in YYYY/README.md files, rebuild www

'For addition information' should be 'For additional information'.

1991/index.html

@@ -193,7 +193,7 @@ judges@toad.com</code></pre>
 purposes only, and should not be used today. See
 <a href="../contact.html">contact.html</a> for up to date contact details
 as well as details on how to provide fixes to any of the entries.
-See also <a href="../faq.html">the IOCCC FAQ</a> for addition information on the IOCCC.</p>
+See also <a href="../faq.html">the IOCCC FAQ</a> for additional information on the IOCCC.</p>
 <h2 id="credits">Credits:</h2>
 <p>We would like to thank Barbara Frezza for her role as official chef
 of the contest. Landon Noll appreciated the opportunity to serve