Doom 3: Classic Shotguns

Makes the shotgun in Doom 3 function like the shotguns from the original Doom games.
This is a group of mods to make the D3 shotgun more like the shotguns from Doom 1 and Doom 2, as well as answer the repeated complaints about D3's super-wide spread for the shotgun. Single-Barrel Shotgun- Makes the D3 shotgun more like the regular