Create melodic devel branch

[Daedalus359]

The code for the entire repository compiles from source without modification on my melodic installation. I am wondering whether opening a new branch and updating the wiki pages for the contained packages is in order.

[meyerj]

I created a branch melodic-devel that points to the same commit as kinetic-devel. Same for dependency https://github.com/tu-darmstadt-ros-pkg/hector_models.

In order to update the ROS wiki someone would have to create a PR at https://github.com/ros/rosdistro to copy the repo references (without the release key for now). I will try to do so in the coming days, but I do not have time at the moment to test and release.

@skohlbr Is there someone in Darmstadt who could take care of the binary releases in the future? Maybe we can combine the handover with a visit to Darmstadt in the coming weeks ;-)

[skohlbr]

@meyerj Yes, I'm open to a handover at some point in the near future ;)