This is the rudimentary beginnings of the 96BoardGPIO library to control
real world hardware via the GPIO on the 96Boards family of boards that
confirm to the CE spec.

One of the cool things about the 96Boards CE project is that all of the
boards use the same pins for the Low Speed Expansion Connector so you can
plug any expansion board into any 96Board and it will connect electrically
BUT there is an issue where GPIO is concerned. Different SoC's have
different GPIO pins. So even though electrically the pins are in the same
place it takes different code to enable and use the GPIO on pins 23 - 34.
Not so fun.

The 96BoardGPIO library tries to abstract the info so that you can just
tell it what board you are using and what pins you want to use and the
library does the rest.