RebeliX induction probe holder

Perfectly working on RebeliX X2 printer, maybe usable for Rebel I/II/II

Remix of:
Original part: nozzle_mount
Github: https://github.com/RepRap4U/RebeliX
Homepage: http://reprap4u.cz
Author: Martin Neruda

Added v2: fixed imperfections, modified screw holes
Added v3: improved construction, additional model to print without support (changed orientation + redesign)