Created common/shared folder, route and activity enumeration and share it between Menu and RunActivity.
Add RunActivity /testall which scans all folders, routes and activities and tries to load each in turn. Can specify paths on the command-line to override folders file.
Add user setting for controlling the number of rendered frames when profiling.
git-svn-id: http://svn.uktrainsim.com/svn/openrails/trunk@616 a9f3cfff-6c41-7446-b0ca-052bd761e6eb