Pseudo Random Tour 1.5.2

This update brings in the option of traffic and a few bug fixes:

• Fixed not being able to play a generated track if the physics are paused during generation
• Checkpoints close to intersections will no longer be added, which should help navigating
• Added traffic as an option - the game will take a minute to load in the AIs but once they are generated, generating a new route with traffic enabled will not re-generate them, so it is a one-time wait (unless you un-check traffic, then you'll have to re-gen them again). This is influenced by the settings in Options > Gameplay, so changing them will change the vehicles spawned in the scenario and how many are spawned
• A little bit of misc code cleanup and refactoring
• Vehicle off-road score will be taken into account - off-road focused routes will favour more off-road focused cars, though this is probability based and so getting a more track focused car is still possible

A known bug is that if you generate a route, you can play it without actually hitting start - I can't quite find a way around this (unless you pause physics hile generating the route). I'm still looking into it, so it hasn't made it into this update