Fix: update license number of prototype and scriptaculous

New: Add more predefined actions

On the fly GZIP compression is done only if bit 3 of constant is set (this is to allow to choose wich optimization we enabled among the 3 actually available).

Fix: Postgresql compatibility

Qual: update scriptaculous en protoype

This allow to include class from modules like this :
if (!defined('DOL_CLASS_PATH'))
	define('DOL_CLASS_PATH', null);
require_once(DOL_DOCUMENT_ROOT.'/categories/'.DOL_CLASS_PATH.'categorie.class.php');

Add warning if postgresql has a wrong configuration