This should enable us to branch and merge easier and keep the revision
numbers of RobWork, RobWorkStudio and RobworkHardware in sync.
The old RobWorkStudio repository still exists to have the history of
RobWorkStudio. Please do not commit to this repository anymore. The
old folder for RobWork and RobWorkHardware does not exists anymore,
but the history should be present at the new location.