https://github.com/Frederikssund/Alternativ-QGIS-installation/blob/master/Readme%20-%20english.md,
https://qgis2015.wordpress.com/2015/05/17/how-to-make-a-qgis-on-a-stick-implementation/,
zentrale_netzwerk-installation_fuer_windows_qgis-setup_fuer_softwareverteilung