Euler support launch files

Not ready for review.

@jrgnicho, can you please pick this up from here.  Euler support should be similar to the ROS-I [support packages](http://wiki.ros.org/Industrial/Tutorials/SuggestedPackageLayoutNewRepositories#Support).

Once this is accepted, we will need to work on a top level launch (`euler_launch`?), that launches the `euler_support`, `euler_navigation`, and `euler_moveit_config`