Add footer to writing index.

voussoir.net/writing/generate_site.py

@@ -426,6 +426,13 @@ def write_writing_index():
         {% endif %}
     {% endfor %}
     </ul>
+
+    <h2>The footer</h2>
+    <p>I greatly appreciate the time you have taken to visit my page. If you
+    have feedback, corrections, or tales of harrowing adventure, send an email
+    to writing@voussoir.net. If you want me to hold on to some of your dollars
+    for permanent safekeeping,
+    <a href="https://www.buymeacoffee.com/voussoir">click here</a>.</p>
     </article>
     </body>
     </html>