add associated simulation files

src/velodyne_simulator/bitbucket-pipelines.yml

src/velodyne_simulator/gazebo_upgrade.md

src/velodyne_simulator/img/gpu.png

src/velodyne_simulator/img/rviz.png

src/velodyne_simulator/velodyne_description/CHANGELOG.rst

src/velodyne_simulator/velodyne_description/CMakeLists.txt

...dyne_simulator/velodyne_description/launch/example.launch

...yne_simulator/velodyne_description/meshes/HDL32E_base.dae

...yne_simulator/velodyne_description/meshes/HDL32E_base.stl

...yne_simulator/velodyne_description/meshes/HDL32E_scan.dae

...yne_simulator/velodyne_description/meshes/HDL32E_scan.stl

...ne_simulator/velodyne_description/meshes/VLP16_base_1.dae

...ne_simulator/velodyne_description/meshes/VLP16_base_1.stl

...ne_simulator/velodyne_description/meshes/VLP16_base_2.dae

...ne_simulator/velodyne_description/meshes/VLP16_base_2.stl

...dyne_simulator/velodyne_description/meshes/VLP16_scan.dae

...dyne_simulator/velodyne_description/meshes/VLP16_scan.stl

src/velodyne_simulator/velodyne_description/package.xml

...velodyne_simulator/velodyne_description/rviz/example.rviz

...ne_simulator/velodyne_description/urdf/HDL-32E.urdf.xacro