Several bug fixes and improvements!

Simplified frequency/rate selection on sound effects
New samples for cockpit ambience, main thrust, bypass growl
Fix for flap/gear/windshield/spoiler aerodynamic noise
Louder missle launch effect
Slowed down Steerhead engine sound effect
Centralized "GetNormalizedPrecip" method for standardized preciptation scalar
Dynamic loading of dock, holiday, and station ID sounds
New LOFI radio station and graphic
Fix for VMU timing and closed captioning
Employed AI to improve shockwave speed and volume calculations
Vehicles now fade into cloud tops in addition to the bottoms
Added REIL to all colony airfields