Added controls box and style, and a title parameter for the arrow

These changes are based on user feedback about wanting a box zoom, not knowing that the circles could be clicked on, and to facilitate the hiding of the info window if desired. Looks a bit ugly, and I don't really understand positioning. @parnelandr could you look over this and let me know if you think it's a good idea? If you like it, you'll probably need to make some adjustments.