robotpkg/image/artoolkitplus bulk build results

curl: (6) Could not resolve host: studierstube.icg.tu-graz.ac.at HEAD failed for http://studierstube.icg.tu-graz.ac.at/handheld_ar/download/ curl: (6) Could not resolve host: studierstube.icg.tu-graz.ac.at http://studierstube.icg.tu-graz.ac.at/handheld_ar/download/: fatal error