Kossel effector for LivePrintAustria CNC head

This allows for mounting a CNC Fraesspindel from LivePrintAustria on a kossel effector. Based on the effector from https://github.com/jcrocholl/kossel

Details of the milling head
http://www.liveprintaustria.at/shop/cnc-frasen/72-frasspindel-fur-rostock-3d.html