[Feature] Restocking Vending machines

[kyle2143]

Thanks for the reply. You're right the 'All-Purpose Cartridge" didn't work. I actually never wanted it to, and was just using it as a parent type for all the varieties so after I made it I forgot about it. An all purpose cartridge really flies in the face of making all the varieties to begin with so I didn't want one. I've just changed the name to be an empty cartridge now so it's clear that it has no interaction with vending machines.

Also about not using ':', I made that change as well. I just don't like having to do that extra initialization for a temp variable only used once, I personally like ':'.