Updated API
Here's some feedback on the Pwm API
Added more bitwise operations to global_entities.h
Added more functions to pwm.c and prototypes to pwm.h
Added code to some functions in pwm.c
Merge remote-tracking branch 'origin/integration' into pwm

Conflicts:
	src/sam3x8e/global_entities.c
	src/sam3x8e/pwm.c
working on pwm_set_channel_prescaler()
Merge branch 'pwm' of https://github.com/theolind/mahm3lib.git into pwm
removed _feedback_pwm and made small changes in pwm.c and .h
Cleaned up earlier work in pio.c and added the defined pins temporary to
pio.h
Merge remote-tracking branch 'origin/pwm' into integration