change error msg in print
Merge branch 'master' of https://github.com/MatthiasFH/amazingRoomPlaner
Merge branch 'master' of https://github.com/MatthiasFH/amazingRoomPlaner
Merge branch 'master' of https://github.com/MatthiasFH/amazingRoomPlaner
extend testdriver; add copy ctor und assignment operator too wall