Nimble V1 Piezo Hotend z-probe for e3d v6 + Magnetic Delta Piezo Effector

### Introduction
Here is the end result of a lot of hard work by a whole list of people: LeadingLights, DJDemonD, Moriquendi and Huntley. We just put the finishing touches to the design. So for the full description, check out [DJDemonD's page.](http://www.thingiverse.com/thing:2069480)

This is an effector with an integrated calibration sensor. The effector is designed to use Huntley's magnetic joints. The calibration sensor is a peizoelectric sensor mounting on top of the hot end. It senses