Announcing rosmon - interactive ROS process monitor

Thanks for the awesome feedback, BrettHemes. Happy to hear that rosmon is useful for you guys!

Just a quick status update: A binary release with many fixes to problems reported by the community is ongoing. I’m fighting with some strange compiler issues on the buildfarm (some g++/ccache interaction), but we should make it in time for the next package syncs for kinetic, lunar, and melodic.

See the changelog for a detailed list of changes.