Doxygen comment updates

Signed-off-by: Dominic Baratta <dbaratta@buffalo.edu>
Added Battery.c and Battery.h to help monitor the health of the main
system battery

Signed-off-by: Dominic Baratta <dbaratta@buffalo.edu>
Doxygen comment updates

Signed-off-by: Dominic Baratta <dbaratta@buffalo.edu>
General Updates

Signed-off-by: Dominic Baratta <dbaratta@buffalo.edu>