Added some docs to CI core files
diff --git a/system/core/Model.php b/system/core/Model.php
old mode 100644
new mode 100755
index 8566a0b..e15ffbe
--- a/system/core/Model.php
+++ b/system/core/Model.php
@@ -42,6 +42,7 @@
 	 * Allows models to access CI's loaded classes using the same
 	 * syntax as controllers.
 	 *
+	 * @param	string
 	 * @access private
 	 */
 	function __get($key)