add account deletion

app/templates/users/settings.html

@@ -77,4 +77,8 @@
   <div>If badges fail to load, make sure JS is enabled.</div>
 </fieldset>
 {%- endif -%}
+<fieldset class="plank">
+  <legend>Disown & Delete account</legend>
+  <a class="linkbutton critical" href="{{url_for('users.delete_confirm', username=user.username)}}">Delete account</a>
+</fieldset>
 {%- endblock -%}