MDL-21249 improved php docs and adding direct access prevention in core libs

lib/outputrenderers.php

@@ -21,11 +21,14 @@
  * Please see http://docs.moodle.org/en/Developement:How_Moodle_outputs_HTML
  * for an overview.
  *
- * @package   moodlecore
- * @copyright 2009 Tim Hunt
- * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ * @package    core
+ * @subpackage lib
+ * @copyright  2009 Tim Hunt
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
+defined('MOODLE_INTERNAL') || die();
+
 /**
  * Simple base class for Moodle renderers.
  *
@@ -2457,7 +2460,7 @@ EOD;
      * @return string
      */
     protected function render_image_gallery(image_gallery $imagegallery) {
-        $this->page->requires->yui_module(array('gallery-lightbox','gallery-lightbox-skin'), 
+        $this->page->requires->yui_module(array('gallery-lightbox','gallery-lightbox-skin'),
                  'Y.Lightbox.init', null, '2010.04.08-12-35');
         if (count($imagegallery->images) == 0) {
             return '';