use markdown2, add forced login. Added breadcrumbs

templates/admin/index.html

@@ -21,6 +21,10 @@
 <td>Registration enabled</td>
 <td><input name=registration_enabled type=checkbox {{ 'checked' if config.registration_enabled else '' }}></td>
 </tr>
+<tr>
+<td>Login required</td>
+<td><input name=login_required type=checkbox {{ 'checked' if config.login_required else '' }}></td>
+</tr>
 </table>
 <input type=submit value=Update>
 </form>