Fixed Tranq Gun Textures + HL Glock-17 for Railgun

Whenever I played spy in Team Fortress Classic, I find it a bit odd how the tranquilizer gun's textures are much more brighter than that of any other weapon, so I decided to simply add the darker textures of the Half-Life Glock-17. I also had to make an entire new DM_base.bmp texture, and it took me a while to figure out how to do that properly. I also took the Half-Life Glock-17, and I changed the animations to be fit for the railgun. This was primarily done for the railgun to suit its (old) world model.