Visualize 3D Bounding Boxes Over Images and Point Cloud Lidar Data in ROS rviz

[iamsiddhantsahu]

@clynamen I was wondering how can we inference some of the pre-trained models in Det3D and draw the bounding boxes over camera images (front, front right, front left, back, back right and back left) and also over the point cloud lidar_top data plotted with rviz?