sitemap: support for draft, levels and templates

Adding support for using article status attribute to indicate
if a document is just a draft. Adding the article attribute
userlevel to create 5 access levels. Access control is not
implemented but the differen sites can be uploaded to different
areas which is protected by for example apache access.
This makes sure that one content source is used for each site.

Adding template support by using the article attribute role to
select the style template to generate the page.