Logitech C270 mount for Hephestos 2

This thing allows to mount a Logitech C270 USB camera to your Hephestos 2's Y-carriage, to have it move with the bed during printing and allow a view of the ongoing print undisturbed by motion. Naturally I use this with [OctoPrint](http://octoprint.org) ;)

This thing mounts into two existing M4 holes on the front of the Hephestos 2's Y-carriage. The position of camera is designed such that the lens is located on the center line of the bed. The camera's front is located just outside the moveme