More work on integrating the map display code
I've managed to make the map sizing code relative -- MJ's page layout was done in pixels originally, but the underlying map handling is within a box that can be sized easily, so that wasn't too hard. I've also started integrating the site style a little bit, starting with the menu, which now looks a bit like the main site menu. I have to decide what components of the main menu I want to include on this page -- there isn't room for them all. Probably just Home and Map Gallery. I'll need to enable keystroke navigation somehow, to comply with our accessibility policy, and that will be quite hard. Then I have to find a good place to put the copyright/disclaimer info on the page, and find space for the metadata about the map. It's going to get a bit crowded. No room for the header graphic, unfortunately, although I'll have to try it out just to be sure.