Record the script execution steps

[wing2791]

install

• create a src folder
  sudo mkdir src
• put the three files into the src
  such as

- src
    - src
    - CMakeLists.txt
    - package.xml

• Enter the previous directory of the first src
  such as
  cd ~/rs_to_velodyne

- rs_to_velodyne
    - src
      - src
      - CMakeLists.txt
      - package.xml

• execute the following command
  catkin_make

using

now in the rs_to_velodyne folder, there are three folders , build,devel,src
source ./devel/setup.bash
roscore
rosbag play myRSBag.bag --pause,press space to continue playing
rosrun rs_to_velodyne rs_to_velodyne XYZIRT XYZIRT
there will be a topic "/velodyne_points"