Add Take Attendance to administrators' menus.

templates/wdn.php

@@ -57,6 +57,7 @@ if (isset($_SESSION['user']) && $_SESSION['user']->get_type() == 'admin') {
     $t->navlinks .= <<<EOF
     <li><a href="index.php?module=main&amp;action=view_attendance&amp;by=all">All Attendance Records</a></li>
     <li><a href="index.php?module=main&amp;action=set_up_events">Set Up Events</a></li>
+    <li><a href="index.php?module=main&amp;action=take_attendance">Take Attendance</a></li>
 EOF;
 }