CR-10 BLTouch mount

EDIT: 2/14/18 - This object was non-manifold, and though it never impacted printing for me ,it was always bothering me. I went back into Blender and just took out the non-manifold bits. I also rotated to the proper printing orientation to save everyone a step.

A simple mount for BLTouch (Smart) for the stock CR-10 setup. I've reclaimed pin 31 from the SD card to use for servo control.