Updates to pwm module.
 - verified duty cycles ranging from 0-100 are being toggled correctly
 - update makefile to compile in bcm2835 library

 Changes to be committed:
	modified:   main/debug.c
	modified:   main/debug.h
	modified:   main/main.c
	modified:   main/makefile
	modified:   main/pid.c
	modified:   main/pwm.c
	modified:   main/pwm.h
	modified:   main/timer.c
	modified:   main/timer.h
Merge branch 'master' of https://github.com/tingx2/sous_vide

Conflicts:
	main/makefile
	main/pwm.c
	main/pwm.h