#1 Provide LINK tags for navigation

[David O'Shea]

It would be nice if LINK tags could be provided for
navigation to previous/next pages and up the hierarchy.
Mozilla provides a "Site Navigation Bar" which
provides buttons to follow these links. While they are
provided as links already, the buttons are in a fixed
location so may be a bit easier to use.

I could probably contribute a patch to do this myself
when I find some time if you like!