Adding com function FTx232H and libmpsse

[HappyCodingRobot]

This PR adds the ability to test a SPI display (I2C tbd) directly without programming a uC via the multi-protocol serial engine of the FTDI FTx232H chips.

Libmpsse is a library for interfacing with SPI/I2C devices via FTDI's FT-2232 family of USB to serial chips. Additionally, it provides control over the GPIO pins on the FTDI chips and supports a raw bitbang mode as well. Based around the libftdi library, it is written in C and includes a Python wrapper courtesy of swig.

(Tested with libftdi 0.2 and libmpsse 1.3)

[HappyCodingRobot]

The I2C com function will come in a later PR ;)

[TCB13]

Please merge!