Last login value, minor update for array to [, smarty include core

When logged in, the last loggedin time is stored in the edit_user table,
additional to the normal logging.

More array() to [] conversion in config files, etc

Javascript: add math.round

Basic Class: Fix key length array mapping to more efficiont loop run
DB/IO: some name fixes in get key function description/comments
SmartyExtended: add CORE CSS/JS file include if exists. Follows after
MAIN and BEFORE page and special

www/configs/config.php

@@ -22,7 +22,7 @@ if (!defined('DS')) {
 	exit('Base config unloadable');
 }
 // find trigger name "admin/" or "frontend/" in the getcwd() folder
-foreach (array('admin', 'frontend') as $folder) {
+foreach (['admin', 'frontend'] as $folder) {
 	if (strstr(getcwd(), DS.$folder)) {
 		define('CONTENT_PATH', $folder.DS);
 		break;