Added a new game-option to toggle the pellet-spread amounts for Shotgun and SuperShotgun Zombies. [Defaults to DoomSpell [which means they shoot the same # of pellets as your shotguns do (which is how it's been for DV-DS since the beginning)], but can be toggle to Classic [ShotgunGuy only shoots 3 pellets [instead of 7] and SuperShotgunGuy only shoots 7 pellets [instead of 20]]