Added in GPIO input and output

Reads GPIO pins 0-3 as input and uses GPIO pins 4-7 to control the
car... hopefully.
Revert "Added in GPIO input and output"

This reverts commit 1f3619cd3e76ef6f8f34cae7f9931d2c0f5e33d3.
Revert "Revert "Added in GPIO input and output""

This reverts commit 2e0295d00c5ae8a3a7f84d3e38b679f3eae9b762.