Nao viz

ok, I moved the PR here.
If you want to save space, you can:
- squash the first commit (temp data)
- squash the second commit (only sources will be used in rQt)

Now, I have a question before you merge this: Florian suggested that the NaoJointsAnalyzer.cpp be moved to ros_driver. Are you ok with that ?
Also, why isn't nao_diagnostic_updater running by default in bringup ?

Ideally, I would like:
- nao_diagnostic_updater to run by default
- NaoJointsAnalyzer.cpp to run by default