Provide a translation layer for incompatible set abbreviations. (Mostly affects promotional cards)

[luziferius]

It seems that many platforms use their own convention for promotional cards or card sets.

When translating decks, the promotional sets have to be translated as well, as the target application may not understand the set abbreviations of the source application.

For example, TappedOut uses "000" for special promotional printings: http://tappedout.net/mtg-set/promo-set/, whilst Scryfall has a set for each individual promotional printing.

TappedOut set list: http://tappedout.net/magic-cards/
Scryfall set list: https://scryfall.com/sets

To solve this, some kind of translation layer is required.

Some promotional sets can be translated between TappedOut and Scryfall 1:1, as both sites have the same set, which only differs in the set abbreviation.

But the TappedOut "000" set needs some special handling.
A giant lookup table will solve this, but will be brittle as it has to be maintained manually.
If possible, a dynamic solution should be created for this case.