Prusa i3 groovemount and induction endstop mount

Yet another way of mounting a J-Head hotend to the Prusa i3, with an induction endstop & 3mm bowden connection.

v2: Separate mount for the induction endstop, allows it to be lowered more.

Vitamins to follow.
LJ18A3-8-Z/BX (http://www.amazon.co.uk/gp/product/B009XP20K6?psc=1&redirect=true&ref_=oh_aui_detailpage_o07_s00)