Comment 12 for bug 101456

If we can support both that would be great. If we can't, bleauugh.

I also notice there's an inconsistency here:
hhttp://infrae.com/ns/silva_document
where we use an underscore, while all the others have a dash.

We should make the zcml namespace consistent with this and also use a dash:
http://infrae.com/namespace/silva-conf