Add SPI pins.
create harness for spi
Connect SPI for FPGA and MCU
Merge pull request #32 from dmpro2014/spi-connector

Spi connector
Merge branch 'master' into fpga-mcu-header

Conflicts:
	pcb/FPGA_IO_3.Harness
	pcb/FPGA_IO_3.SchDoc
	pcb/MCU.Harness
	pcb/MCU.SchDoc
Fixing fpga headers so it's mergable