Fixed base class as it was apparently causing an interaction bug inside helicopters.

Added Italian translation, thanks a ton, Sgt. Dornan.

> Dispensers now have a property for a specific barrel, so it's now possible to add dispensers that give you different barrels.
> You can now spawn dispensers with Zeus.
> Added some safe distance between the helicopter and the barrel, as some vehicles like Little Birds were a bit too close and would sometimes be damaged.
> The mod is now available in German! Huge thanks to nic547.

Initial commit.