pr2_navigation_apps maintainer trainsition

pr2_navigation_apps has not been maintained recently (~2015). I want to release for kinetic, but both pr2_navigation_apps and pr2_navigation_apps-release are only maintained by Devon Ash who is not longer supporting pr2 development. I ask to become the new maintainer so that I can merge a commit that makes things compile in kinetic and melodic and to release a kinetic and melodic packages.

@davefeilseifer Thank you for volunteering! I have added you as a collaborator of these repositories. I think we’re ready for releasing kinetic/melodic packages if we do have further responses in a few days.