modified:   Makefile
Added: debug options
	modified:   P9813GPIO.c
Modified: use nanosleep instead of usleep
Added: conditional compile macro for LEDs
	modified:   P9813GPIO.h
Added: conditional compile macro for LEDs
	modified:   PN532SPI.c
Added: Use CHIPSELECT macro to self-define ChipSelect pin, this is must fit the output pin number.
	modified:   PN532SPI.h
Added: CHIPSELECT macro to self-define ChipSelect pin, this is must fit the output pin number.
REMOVED: PN532 TxRx transmission functions in headers.
	modified:   main.c
Modified: LED init and control should be done by P9813GPIO, so any LED init related are removed from this file. Go check P9813GPIO.c