Multipart cards should have some indication which part is primary and which is secondary

[taw]

There are quite a few cards with multiple parts:

• split (including fuse)
• flip
• dfc
• meld

Currently json data doesn't indicate which part is "primary" (directly playable) and which isn't. I thought about coming up with some rules downstream, but they're fairly silly:

• split - all are primary
• dfc - the one with mana cost generally primary, except Westvale Abbey is special case
• flip - both have same mana cost as per rule 709.1c, so the only way is grepping A vs B in card number
• meld - same as for DFCs, except for Hanweir Battlements as special case

Terminology "part type", "primary", "secondary" has no rules meaning, I just came up with that to describe the problem, feel free to use completely different wording.

[bakert]

The first name in "names" is always primary. In the case of meld cards the first two names in "names" are primary. In the case of split cards all the names in names are primary. An explicit indication might be better.