Add libopencv-dev key for OS X

Needed by image_geometry.
Merge pull request #3653 from mikepurvis/patch-5

Add libopencv-dev key for OS X
ros_control: 0.7.0-0 in 'hydro/distribution.yaml' [bloom]
Merge pull request #3654 from jack-oquin/master

add some of my packages to indigo
Merge pull request #3655 from adolfo-rt/bloom-ros_control-0

ros_control: 0.7.0-0 in 'hydro/distribution.yaml' [bloom]