Update 2018-07-29: Ballistics for days

• Overhauled ballistics model: now it approximates real-world behavior including quadratic air resistance and sensitivity to atmospheric conditions
• Overhauled fire control system calculations to account for the new ballistics model not being solvable analytically
• Switched shot movement to incremental motion using Runge-Kutta method for fidelity
• Added ability for AI gunners to use new FCS when aiming
• Changed penetration model to more correctly relate to projectile energy
• Changed armor values on NATO triple heavy targets in firing range
• Ammo performance is now affected by propellant temperature
• Fixed HEAT warhead effectiveness depending on projectile speed
• Fixed AI gunners not being able to handle vehicles with missile launchers only
• Fixed issues with game volume level settings