Metatag definitions for OIS.

Also the title is build here depending on the connected database.

• author: Sascha 'SieGeL' Pfalz <php@saschapfalz.de>
• version: 1.36 (17-Nov-2007) $Id: header.inc.php,v 1.7 2007/11/18 01:15:26 siegel Exp $
• license: GNU Public License