Added pulse rate interrupt counting.  Right now, matches 1-1 with the frequency, ie 1hz -> 1 raw pulse rate.
Changed to use usnprintf(). usnprintf() doesn't have floats, so casted arguments to ints
Added pulse rate measurement interval
debu
Updates
Added
Merge branch 'master' of github.com:ellingjp/ee472

Conflicts:
	lab3/code/schedule.c