title: Save pcl::PointCloud<pcl::PointXYZRGB> in format compatible with Meshlab
body: <p>Is there any function in PCL library to save <code>pcl::PointCloud&lt;pcl::PointXYZRGB&gt;</code>  point cloud in format XYZRGB that can be opened with Meshlab?</p>
  
  <p>Seems <code>pcl::io::savePCDFileASCII (filename, cloud);</code> stores RGB values in some specific way.</p>