Fix default PWM output polarity which was previously inverted from the normal requirement.
Added MPXA6115A MAP sensor to library and switched to it for AAP default in place of obsolete MPX4100A unit.
Remove guessed future engines. Add place holders to ease merge conflicts. Reorder top level Makefile slighty.
Added EFI configuration for the Snot Rocket, including a reasonable tune and reduced dwell table to avoid overdwell discharge.