Add icon copyrights + PoseWithCovariance icon #430
Merged
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Close #408
I cherry-picked the commits introducing the icon copyrights from the upstream ros-visualization fork. That way, the original authors are preserved. I only deleted the Github issue numbers as they would point to the wrong issues.
In addition, I cherry-picked the commit adding an icon for the PoseWithCovariance display (I have it ported and will provide a PR once this gets merged).
I still think that the "Public Domain" license should be switched to CC0 (which is identical wherever Public Domain exists but provides a valid license wherever it doesn't), but this is a maintainer decision of course.