Added A new companion EIDSON:

     Shoots a laser blasts.

     Find the abandoned lab and rebuild it and it will join you. Beware it is very expensive to build.

     TODO:

     -     Make EDISON repairable with a wrench only (not normal healing methods like food or health packs).

Added a location with the slug pistol.

     Find the location and loot the slug pistol to unlock the weapon.