Photo galleries relaunched

I have been putting the final(ish) touches to the new photo galleries today, and after a few little teething problems have managed to get them all up and running again. You may not notice much difference, because the main changes are in the backend, to allow me to maintain it much more easily. However, there is one big change that is apparent - when you click on a photo, it will no longer open up in a new window, instead loading into its own little page. Please note also that as I've only just implememented the new system, most of the photos don't have descriptions yet, so I'll be doing that whenever I get a chance.