Kart Racing Pro release3

Kart Racing Pro release3 available.

Changelog: fix: jump start detection fix: add trainer fix: kart stand in loaded replays fix: Genk corridors fix: Genk Small pit area fix: Zuera Short new: save and restore of the dynamic track surface between testing sessions new: track category support new: added the automatically saved trainers to the "Add Trainer" dialog new: animated flags