====== ROS Subscriber Laser Scan ======
This block receives a ROS message of type ''sensor_msgs::LaserScan''. Each time the block is run by its time domain, the last message received is driven on its output signals.
<code cpp>
  // create subscriber block, laserscanner range has a size of 150 values
  RosSubscriberLaserScan<Matrix<150, 1, double>, Matrix<150, 1, double >> laserScan("myNode/myTopic", 100, false);
</code>

The template parameter of the block determines the size of the range and intensity vectors.