Add usb_cam to ROS Kinetic main repository

[de-vri-es]

@k-okada

So for me,if the package is too important specially for beginner useres, then it will be located within in gap between users and current/potential maintainers, it is dead-locked. And I’m afraid we’ll have this problem on every year 2016(Kinetic), 2017(Lunar), 2018(M). So question here is can we start thinking any way to solve this? Try to find a way that can help back to the correct path?

If you have the time, how would you feel about maintaining a fork of usb_cam and guide it into Kinetic? I think that would pretty much solve the problem.