Upload groups of cards for deck building

I'm still new and exploring Roll20, so please let me know if this feature is already available and I just missed it somewhere. Great job so far on using a deck of cards. Building a deck from scratch however is easy, but tedious for any sizable deck. A method to mass upload multiple cards at once to build larger decks would be fantastic. For example, I'm a big fan of the Gamemastery Critical Hit and Critical Fumble decks--each 52 cards. I've already got them scanned in and ready to go, but building two, 52 cards decks--one card at a time is rather time-consuming.

People playing the latest edition of Gamma World would also benefit from a similar solution. You need a couple of decks at least, an Alpha Mutations deck and a Omega Tech deck.

I suggest some kind of zip folder based loading.