Development work on "Frontline1" mission files.
Development work on "Frontline" game mode server scripts.
Small cleanup in Projectile class.
ShotgunProjectile changes:
- Use advanceTime() instead of processTick() to advance simulation of tracers.
- Add originating position & vector to ShotgunFireEvent.
- If muzzleVelocity is <100, determine speed of tracers based on distance to impact position.