added link to #furtherreading section in appendix B

table-of-contents.html

@@ -391,6 +391,7 @@ ul li ol{margin:0;padding:0 0 0 2.5em}
   <li><a href=special-method-names.html#pickle>Classes That Can Be Serialized</a>
   <li><a href=special-method-names.html#context-managers>Classes That Can Be Used in a <code>with</code> Block</a>
   <li><a href=special-method-names.html#esoterica>Really Esoteric Stuff</a>
+  <li><a href=special-method-names.html#furtherreading>Further Reading</a>
   </ol>
 </ul>
 <p class=c>&copy; 2001&ndash;9 <a href=about.html>Mark Pilgrim</a>