naoqui_tools not depending on robot descriptions

I was gonna test Nao in ROS and, hopefully, in Gazebo. I didn't find any updated guide on that so I'm just debugging as I work.

I did a:

    rosdep install --from-paths src --ignore-src --rosdistro hydro -y

On a workspace with only ```nao_robot``` and ```naoqi_bridge``` and I got:

    ERROR: the following packages/stacks could not have their rosdep keys resolved to system dependencies:
    naoqi_tools: Cannot locate rosdep definition for [romeo_description]

As it's named "tools" I think that maybe it shouldn't depend on the robots descriptions (or you'll need all of them in the workspace!).
Merge pull request #17 from awesomebytes/patch-1

naoqui_tools not depending on robot descriptions