Import random cards from several revisions with Webcam

[ecotechie]

It would be useful to download all revisions at once so if we are scanning random cards, we can more easily use this feature. Otherwise I would have to first sort all the cards by revision, then scan.

Not sure how large of a download this is, or needs to be, but it may be a benefit. Maybe if the file sizes are really large, paring down what they are (or need to be)?