Fixup headers, maintainers, README, before public release #50

Job	Run time
determine-distros	2s
Generate Debian packages for ROS2 humble	8m 12s
Generate Debian packages for ROS2 kilted	8m 10s
Generate Debian packages for ROS2 jazzy	8m 6s
Generate Debian packages for ROS2 iron	7m 42s
Generate Debian packages for ROS2 rolling	8m 22s
Smoke test ROS2 iron	1m 11s
Smoke test ROS2 jazzy	1m 12s
Smoke test ROS2 kilted	1m 21s
Smoke test ROS2 rolling	1m 16s
Smoke test ROS2 humble	1m 15s
	46m 49s

Provide feedback