Significantly rewrote ICCardReader and DeckReader functionality.
Dual IC card slots of VirtuaStriker4 + Gekitou now work.
IC cards are automatically inserted/ejected in VirtuaStriker4 + Gekitou + Avalon.
IC card data is saved to a file.
Avalon deck contents are loaded from a JSON file.
Added IOPorts class to handle bespoke GPIO functionality.