navdata: add a 'type' field to the JSON returned from the json() members
navdata: add a 'type' field to the JSON returned from the json() members

rc500/ardrone_archive_aarons_laptop,rc500/ardrone_archive_aarons_laptop,rc500/ardrone_archive_aarons_laptop,rc500/ardrone_archive_aarons_laptop,rc500/ardrone_archive_aarons_laptop