Fixed bug flames can not damage soldiers in cars.
Fixed bug tank commanders can be damaged by flames burning on the ground.
Added fuel container catching fire scripts.

Fixed bug flamethrower infantry can not receive kill count.
Reduced aim range of pistols to 25m to prevent flamethrower infantry switching weapon frequently.
Increased firing rate of pistols for AI in close range.

Adjusted scripts for better compatibility with other mods.
Implemented an new burning mechanism for vehicles, increasing their burning toughness.
(Vehicles are still easy to be ignited with extra damage setting submod.)

Fixed graphic error when burning trees.
Added burning death sound effect.
Improved allow flames to creat more burnig area.

Added missing burning effect for vehicles in vanilla.
Fixed some vehicle were so hard to be burned out for missing "Engine" collider.
Now soldiers can refill fuel container via vehicles.

Increased burning capability of molotov coctail.
Molotov coctail can be throwed through windows now.