Test level for cart track tiles

[Admins]

The attached file contains a level which
calls addtiledef2 to set the tiles for the
level to use the kart/cart tiles. It has
a round track and 2 turbos/accelerators
on it, so you can use it as example to
build your own cart race tracks. If it's
nice then submit it to me or on the
levels editing forum. There should
be different types of tracks, like
night-track, in caves, etc.