support for observers

templates/vote.html

@@ -8,7 +8,13 @@
     {% include "questions.html" %}
     <p>
       <input type=submit name=submit /><br>
-      <span class = "warning">Votes can not be edited later!</span>
+      <div class = "warning">
+        You can only vote once!
+        <ul>
+        <li>Votes can not be edited later</li>
+        <li>Empty choices counts as empty, used vote</li>
+        </ul>
+      </div>
     </p>
   </form>
 {% endblock %}