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