\subsubsection parameters ROS parameters

Reads and maintains the following parameters on the ROS server

- \b "~linear" : \b [double] manual linear speed (m/s) min: 0.0, default: 0.1, max: 0.5
- \b "~angular" : \b [double] angular speed (rad/s) min: 0.0, default: 0.5, max: 2.0
- \b "~delay" : \b [double] inactivity delay (s) min: 0.0, default: 2.0, max: 10.0

