This is a bit controversial, even for me, but for the time being, we need to tie very specific information to each type of item. That means that a Rom and a Disk, though they both have hashes, they have different hashes. I'm going to see how this plays out for the time being.
This effectively doesn't do much for the time being since there's only one "Dat type" that's being used. Realistically, this is probably the best bet since a given DAT should not be restricted to an output type as much as an ItemType is bound to its data. This also removes the experimental classes that won't be in use for forever. More work still might need to be done but it is unknown at this point.
