Began to add PALConfig

Signed-off-by: Jacob McGladdery <jacobm117@gmail.com>
Created an LED blinker demo

Signed-off-by: Jacob McGladdery <jacobm117@gmail.com>
Implemented most of the PAL

However, the demo application is not working. The problem could be in
the HAL, PAL, or in the way I wrote how ports should be accessed.

Signed-off-by: Jacob McGladdery <jacobm117@gmail.com>