ZProbe Sensor Platform for Rostock

This was supposed to be a Z probe sensor mounted directly on the Platform, before you add your hot end, in order to calibrate your delta X, Y and Z Offset and also Radius.

You need:
* some switches between 3-6 is up to you. You can find on banggood some small switches [here](http://www.banggood.com/100pcs-Mini-Micro-Momentary-Tactile-Tact-Switch-Push-Button-DIP-P4-p-917570.html?p=2L17062217407201508V) or long switches [here](http://www.banggood.com/100Pcs-Tactile-Push-Button-Switch-Tact-Swi