Added Itemset Logic

Added the logic for an itemset. Added some filesystem stuff. Added some
stubbed classes to be used later. Added paukov's combinatorics library.
Basically just trying to commit often.
Added items; fleshed out characters a little.

Copied the item classes from my old project over to the new one. Also
added some more functionality to the LolCharacter class.
Adding items... again?

Adding the items didn't seem to work last time. Still getting used to
git...