- [x] tags not part of card hash
  - [x] lock file
  - [x] cram mode
  - [x] store tags without hash-char
  - [x] check entire file is valid utf8 when parsing file
  - [x] @carddown-ignore anywhere in file skips it
  - [x] reversed revise mode / always / sometimes
  - [x] Algo in revise footer
  - [x] Date added in card data
  - [x] Revise-count in card data
      - [x] show this extra info in audit view