Krcg

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- Additional rulings
- Fixed rulings pertaining to multi-target actions

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- CLI card command: Ruling links are now optional
- CLI card command: Card text can be displayed without rulings
- CLI card command: Card IDs can be used
- Analyzer gets affinity computation: now a proportion of presence, with variance
- CLI affinity command: add expectation and deviance
- API complete: Fix completion for special chars

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- Include 2020 rulings from VEKN forum.
- Fixed completion API: match all words, better match are returned first.
- API: Cards can now be fetched by ID
- Added general rulings applying to multiple cards

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- Update rulings.

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- Additional rulings.

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- Upgrade runtime to Python 3.8.2