study group update calculations

booking.module

@@ -381,6 +381,15 @@ function booking_menu() {
 			'access arguments'                    => array('edit study groups'),
 			'type'                                => MENU_LOCAL_ACTION,
 		);	
+		
+		$items['admin/booking/studygroups/update'] = array(
+			'title'                               => 'Update Study Groups',
+			'description'                         => 'Calculate updated Study Group memberships',
+			'page callback'                       => 'drupal_get_form',
+			'page arguments'                      => array('booking_studygroups_update'),
+			'access arguments'                    => array('edit study groups'),
+			'type'                                => MENU_LOCAL_ACTION,
+		);			
 	}
 
 	//configure rooms