1.1.0 release

1. Change most of the strings to PSTRs (PROGMEM). Use a clever macro to fetch them into a temp buffer on demand.
2. Save the operating mode in EEPROM, as well as which car has the baton if in sequential mode
3. Add a sequential mode offer timeout. If both cars are in state B, then the pilot will be moved back and forth every 5 minutes just in case the car that's "not it" changes its mind.