Control/UAV/Ardupilot: Added path_ref to another consume-method.
Control/UAV/Ardupilot: Added guidance support for arducopter
Merge pull request #19 from krisklau/feature/ardupilot_path_ref_2

Control/UAV/Ardupilot: Added path_ref to another consume-method.
Merge pull request #20 from krisklau/feature/arducopter-guidance

Control/UAV/Ardupilot: Added guidance support for arducopter
DUNE/Tasks: Added PlainEntity base class, only responding to EntityInfo messages.
DUNE/Tasks: derive Entity from PlainEntity.
DUNE/Tasks: make the PlainEntity dispatch functions public.
Sensors/WorkhorseNavigator: fixed segmentation fault while reading position and orientation.
Merge branch 'master' of github.com:LSTS/dune into feature/entityobject
Sensors/WorkhorseNavigator: use PlainEntity object for beam entities.