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

4dev/database/table/edit_user.sql

@@ -31,6 +31,7 @@ CREATE TABLE edit_user (
 	email	VARCHAR,
 	protected SMALLINT NOT NULL DEFAULT 0,
 	admin	SMALLINT NOT NULL DEFAULT 0,
+	last_login	TIMESTAMP WITHOUT TIME ZONE,
 	login_error_count	INT DEFAULT 0,
 	login_error_date_last	TIMESTAMP WITHOUT TIME ZONE,
 	login_error_date_first	TIMESTAMP WITHOUT TIME ZONE,