Tags Page Update

An update to the Tags page: instead of the old method of displaying map-related photos from Flickr, which was built from a search-based RSS feed and updated only when the index pages on this site were rebuilt, you can now quickly display sets of photos with a given tag by choosing from a list. This is thanks to a new feature from Flickr, and should work better and be more up to date than the previous method. (Tried doing this in Ajax, but it was beyond me.) Still much more to be done on that page; this is only an incremental improvement.