message: Add a thermal subscriber.
diff: @@ -13,6 +13,10 @@ ThermalServer::ThermalServer(const ros::NodeHandle& nh,
  nh_private_.advertise<pcl::PointCloud<pcl::PointXYZI> >(
  "thermal_pointcloud", 1, true);
  + // Set up subscriber.
  + thermal_image_sub_ = nh_private_.subscribe(
  + "thermal_image", 1, &ThermalServer::thermalImageCallback, this);
  +
  thermal_layer_.reset(
  new Layer<ThermalVoxel>(tsdf_map_->getTsdfLayer().voxel_size(),
  tsdf_map_->getTsdfLayer().voxels_per_side()));
  