Changes charcoal water purifier functionality a bit.

Instead of somehow eating massive amounts of charcoal in order to purify water, it now requires charcoal to produce and works in a much more reasonable fashion; purifying water until the charcoal filter inside is depleted, and once it's out of charges it can be disassembled to reclaim the plastic jug and rags required to make it.

This makes it more efficient in terms of charcoal use, but it also means that it can't be reloaded in the usual sense.