+ Began porting the Pirate4WD platform over to Raspberry Pi architecture.

Signed-off-by: swordmaster2k <b00056835@student.itb.ie>
* Changed project to from RoboNav to BotNav.
* Moved Pirate4WD arduino implementation.
* More work on Pirate4WD pi implementation.

Signed-off-by: swordmaster2k <b00056835@student.itb.ie>
* Some commenting, documentation, and exception handling.

Signed-off-by: swordmaster2k <b00056835@student.itb.ie>