rosbag

[dirk-thomas]

• Finish up design document draft: article about rosbags in ROS2 design#160
• Python CLI: Implement ros2bag as part of new ros2cli verb rosbag2#2
• rosbag API: Implement rosbag API rosbag2#3
• rosbag storage API: Implement ros2 agnostic storage API rosbag2#4

More subtasks to come when design doc is merged.

[dirk-thomas]

@Karsten1987 Can this be closed?

[Karsten1987]

the design doc is still not merged, but I am okay to close this.