Water

The last two updates introduced water. It does not render nicely in the browser yet (at least in _my_ browser :-D ). But since water is a rather defining element of many cities, this is a rather important step.

I kind of like the trees occasionally standing in the water... but one of the next things should be adjusting the vegetation to the give area :-)

Oh, and I added a zoom to the mousewheel - now you can see the ruined cities from a distance inn all their glory ;-)