RaceTrack 0.3.21

This is for the coming Rust update. Do not update prior to the game update

Implemented reset command for foot races

Added config option "Spawn a light on every X segment"
Don't spawn checkpoint pieces under the terrain
Changed light type config option to have a bunker light option
Removed lantern light type option because you can hardly see it
Change checkpoint segment generation code to produce a cleaner looking arch/circle that aligns properly and doesn't have flipped rotations on the bottom half

Added support for foot races

Disable isKinematic toggle for minicopters and prevent engines being started until race starts

Added chat command '/race openrandom' to open a randomly selected race
Added console command 'race openrandom' to open a randomly selected race

Cancel all queued crafting and return resources when race starts

Snowmobile support

Fixed for Rust update

Fixed mounting issue