Rename car_vin f-me/carma#1303
Format parameter is not required
Merge remote-tracking branch 'refs/remotes/origin/vinnie' into vinnie
Revert to open-kinded format field parameters

Parameters do not require to be singletons. They're still separate
types so we can implement ParamType family. Title parameters are
singletonized to keep the design space for a tidier `ffaTitles` open.