Robotics Systems Types

Should the new type be added to the master branch?

Also, please modify the documentation string along the lines of

/**
 * A set of 3D Point clouds.
 *
 * @author NAME <EMAIL>
 */

Please comment the clouds field like this:

/**
 * Empty collection of clouds is (allowed|not allowed).
 * The order of cloud objects (is|is not) significant.
 */
repeated geometry.PointCloud3DFloat clouds = 1;

Please submit a new patch with these modifications. Sorry for the inconvenience.