Realism Overhaul - Effects

This mod aims to increase the immersion of the games visual effects.
It may have a negative effect on performance when a lot of stuff is happening at once.

Current changes:
- All bullet hit effects have been improved to have more impact
- Dust from explosions, bullet hits and vehicle tyres last longer
- Tracers are now brighter
- Weapons kick up dust when fired near surfaces
- Mortar shells landing lift off dust that stays for longer
- Muzzle flashes are slightly brighter and cast shadows now properly
- Shell casings last longer and bounce more realistically
- Improved fire effects to be more realistic
- Vehicle dust trail on dirt and sand only happens when the surface is dry