Support for graph_msgs

[davetcoleman]

Oh look, a new ROS message type made exactly for rqt_dot!
https://github.com/davetcoleman/graph_msgs

[jbohren]

One could write a simple python ROS node that queried the master for the type of a given topic, and then determine if it has a geometry_msgs/Edge array in it. Then it could just dump the contents of the graph nodes for the data inside the graphviz nodes.

That would be three different types of "node" in that paragraph...