Model 3905 LapTimer

[raceamerica]

C.03
- change to higher speed clock
- add one second time delay to prevent power up conflict
- add more delay to align loop due to higher xtal freq

C.04
- enable output to pc also when output to external display

C.05
- add live count output to scoreboard as config option
- add selectable live count

C.06
- add clear scoreboard when STOP pressed