function.
Inline delay functions and change base function to
use __builtin_avr_delay_cycles(). Generated delays
are at least as long as the requested delay and
compensate for the system clock (based on F_CPU).
Delay functions must be called with constant values.
A compile time error is issued if they are not.
Delay.c removed as it is no longer used.
Markus Hitter
Jim McGee
Michael Moon