Moved my custom MAVLink messages for the seaslug to a more sane location.
Added a MAVLink message for transmitting the magnetic variation output by the GPS200.
Fixed missing include for Acs300.c lib.
Updated the MAVLink location to ../mavlink/seaslug for the primary node.
The Primary node now uses the same Ecan1 library that everybody else uses instead of my old ECAN_dspic library.
All the included tests have been obsolete for a while and I doubt many of them still compile. Gonna just remove them to prevent confusion in the future.