Another code move/architecture update; creating ORTS.Menu, ORTS.Content and ORTS.Settings libraries. Should be pretty much done for splitting up in to new projects, but a few bits remain in the wrong project.
git-svn-id: http://svn.uktrainsim.com/svn/openrails/trunk@2052 a9f3cfff-6c41-7446-b0ca-052bd761e6eb