Simple demo:

* Terminal 1:
roscore

* Terminal 2:
./test/mock_server.py example.yaml
<watch here for output>

* Terminal 3:
./scripts/client.py example.yaml

* Terminal 4:
rostopic pub foobar std_msgs/Int32 49 --once
rostopic pub barfoo std_msgs/Int16 10 --once
rostopic pub bat geometry_msgs/Quaternion 1 2 3 4 --once
rostopic pub baz actionlib_msgs/GoalID 0 \"42\" --once

