less draconian card update function [bounty: 20 XTR]

[DreadKnight]

In the game's dash, can't see abilities of Kraken unit for example, because some energy values haven't been defined. The function for updating that stuff should be way more lose and just skip missing stuff or have a predefined value for that. That way, it will get easier to work on additional unit sets pretty soon, being able to constantly check out the progress.