message: offboard: improve plugin description
diff: @@ -7,7 +7,10 @@ namespace dronecore {
  class OffboardImpl;
  /**
  - * The Offboard class allows do offboard velocity control of a drone.
  + * The Offboard class allows to control a drone by velocity commands.
  + *
  + * The module is called offboard because the velocity commands can be sent from external sources
  + * as opposed to onboard control right inside the autopilot "board".
  *
  * Attention: this is work in progress, use with caution!
  */
  