ROS 2 wrapper for velodyne drivers

@tfoote / @dirk-thomas - I am one of the current maintainers for https://github.com/ros-drivers/velodyne. Is there any way that one of you (or any of the other ros2 Github maintainers) could create a velodyne fork under https://github.com/ros2/velodyne so I (and others) can begin working on the port in an official repo?