Quadoval Island Super Speedway 1.5

Trioval update 1.5 Change log:

-Reduced foliage density across the map to help with performance
-Reduced shadow distance and set gravity to the default value.
-adjusted the asphalt and dirt physics settings hoping for better drivability on surfaces.
(if either of the above negatively effect drivability I will revisit)
-reduced map file size and removed unneeded files.
-addressed remaining material issues

-added a trioval race track with a small dirt course {wip}
-frogs in the bushes...