One function for both Master and Slave configurations.
WPI SPI
Merge branch 'master' into WPISPI

Conflicts:
	src/code/main.cpp
WIP SPI
Error, we always get SPDR = 0xFF;
Starting from 0
SPI WORKS
PinMode function added
IMU class
Changes reverted
SPI interface
SPI interface
Merge branch 'WPISPI' into Imu

Conflicts:
	src/code/communication/spi/spi.cpp
	src/code/communication/spi/spi.h
SPI interface
Merge branch 'WPISPI' into Imu

Conflicts:
	src/code/communication/spi/spi.cpp
SPI interface
Singleton accessor
Merge branch 'WPISPI' into Imu

Conflicts:
	src/code/communication/spi/spi.cpp
	src/code/communication/spi/spi.h
work in progress
Imu interface finished