Add an example

[chfritz]

I was trying to run this to see more examples of what you expect as message handlers in rosjs (working on RethinkRobotics-opensource/rosnodejs#6). But I wasn't quite able to figure it out -- I'm still somewhat new to ros. I tried the script and also tried rosrun after catkin_makeing the package, but didn't get very far.

Could you show me an example invocation of this script? (and maybe add it to the readme?)

[chris-smith]

Documentation is certainly lacking in both packages right now... gennodejs should be run automatically when you invoke catkin_make in your workspace and any message packages should be passed to it. It's possible that you will need to pull down message_generation and add a dependency on gennodejs before this will work, though in our experience this hasn't been necessary. After its been run, you can find the generated code under devel/node_js/ros/<message_package>