take advantage of the multi folder uploading https://github.com/ros-infrastructure/reprepro-updater/pull/3 hopefully fix https://github.com/ros-infrastructure/buildfarm/issues/115
fixing username
simplifying upload process by using higherarchy
documentation
Merge pull request #147 from ros-infrastructure/multi_source_push

take advantage of the multi folder uploading https://github.com/ros-infrastructure/reprepro-updater/pull/3 hopefully fix https://github.com/ros-infrastructure/buildfarm/issues/115