Added the joystick control over nuRef and stateRef. Added an asynchronous merger node that can merge multiple BodyVelocityReq and BodyForceReq into a single request topic based on requester name and disable_axis parameter. Continued work on the SimMan gui for testing ROV control and navigation.
Merge branch 'ldtravocean_branch_v2' of http://github.com/labust/labust-ros-pkg into ldtravocean_branch_v2