Changed ammo used by the small ship sentry gun from NATO 5.56mm to MR-20 because 5.56mm can no longer be produced in assemblers after MW update

changed <MissileSkipAcceleration> on Ammo defs from "true" to "false" to fix slow moving projectiles

updated BigBertha damages and projectile speeds to compensate for game changes to missile mechanics

major code overhaul: all CubeBlocks and AmmoMagazines sbc's are now up to date with current game definitions. Many minor changes to weapons including missile velocities (standardized to 400m/s) and idle movements set to false.

changed volume of BB ammo, reduced BB int projectile speed and increased BB explosion damage

updated artwork

fixed object class on LittleDavids from <GattlingTurret> to <MissileLauncher>