Style update

I found some time to implement visible links to the RSS feeds (they're now on the right hand side of the page title for the main index and each tag) - before you had to have a browser that understood the alternate link syntax embedded in the head tag or look at the source or replace the ".html" with ".rss" in the URL.

I also adjusted the colour scheme - now it's black on white with brown accents. The printable stylesheet is black on white (no brown) with link URLs made visible and the page navigation elements hidden. I haven't yet figured out how to make in-page links for stylesheet selection - for now you can use "View → Page Style → print" (in the Iceweasel menus, other browsers may vary).