more comments in poi.h
Added code to multiply functions in pwm.c
Added more code to functions and added and corrected comments.
Merge remote-tracking branch 'origin/integration' into pwm

Conflicts:
	src/sam3x8e/pio.h
	src/sam3x8e/pwm.c
Merge remote-tracking branch 'origin/integration' into pwm

Conflicts:
	src/sam3x8e/pwm.c

+ Created new files to store my bitwise_operations so that I don't have
to copy them into the APIs I work with.
+ Changed function names in delay.h to fit with the convention.
+ Removed HIGH and LOW and SUCCESS definitions.
+ Removed all conflicts that was due to outcommenting of my code by
others, because the initial merge from refactor_API to the integration
was not without conflicts and the members could not compile the code.
Merge remote-tracking branch 'origin/integration' into pwm

Conflicts:
	src/sam3x8e/delay.c
	src/sam3x8e/delay.h
	src/test/test_delay.c
Merge remote-tracking branch 'origin/pwm' into integration