* Panda safety code for Volkswagen, Audi, SEAT, and Škoda.
* First pass at MISRA compliance.
* Second pass at MISRA compliance.
* Fix scope of violation boolean.
* MISRA doesn't care for implicit cast of unsigned int to boolean.
* Remove superfluous newline.
* Remove unused VW ignition hook code, preserve commentary.
* Add 50% padding to max delta check.
* Add 50% padding to max delta check.
* Add clarity around the origin of our safety constants.
* Update test RT delta to match safety.