Heavy Machine Gun Turret for Krastorio2

Adds a lamely-edited Gun Turret for use with Krastorio 2 that makes use of the Anti-Materiel Rifle magazines that you accidentally manufactured thousands of and will never ever get rid of otherwise. With longer range, higher damage, and low-ish rate of fire, the HMG is a great complement to mid-tier defenses, particularly when playing with Natural Evolution, Rampant, or other enemy-enhancing mods, excelling at taking out singular high-health targets, though suffering quite notably against even moderately-evolved swarms. Pair with regular gun turrets, laser turrets, or explosive-flinging turrets for maximum effect. People who assert it is merely an AMR strapped to a gun turret are filthy liars.