Enemy Damage

Lert: There are two states for modules: Damaged and Destroyed.   A damaged optics doesn't affect anything. Destroyed optics reduce vision range by half for a duration while it repairs. A damaged track doesn't affect anything. Destroyed tracks immobilize a tank for a duration while it repairs. A damaged radio doesn't affect anything. Destroyed radio halves radio range for a duration while it repairs. A damaged engine halves engine output. A destroyed engine immobilizes a tank for a duration while it repairs. A damaged turret drive halves turret rotation speed. A destroyed turret drives immobilizes a turret rotation for a duration while it repairs. A damaged gun makes it significantly less accurate. A destroyed gun causes a tank to be unable to fire for a duration while it repairs. A damaged ammo rack halves reload speed (makes reload take twice as long). A destroyed ammo rack instantly explodes and kills the vehicle.