Gunner, Heat, PC - M1 Abrams updates

M1 update includes:
Working .50 cal commander turret
Ballistic computer scope sight remade to more accurate early models M1 scope aperture.
Sounds not added to react suspension movements, when you hit bumps.
Sounds added to react tracks movements(squeaking noises etc)
Sounds added for in-cockpit view, making it more immersive.
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Mission is - Abrams Valley, customized.
In order to customize mission, you need to win it in vanila mode, so game give you customization option.