* the regexp starting from a glob line.
* - use xpath instead of regexp like in http://a32.me/2009/11/greasemonkey/
* - use jquery, like shown in http://a32.me/2009/11/greasemonkey/
+ * - Support the "download" attribute for anchors:
+ * http://www.whatwg.org/specs/web-apps/current-work/multipage/links.html#downloading-resources
*/
/* Fields supported by the "site" object.