Z Probe for Mechanical Endstop

Reworked Z probe from [ImmersedN3D's](http://www.thingiverse.com/ImmersedN3D/about) [E3D V6 Bowden mount with servo](http://www.thingiverse.com/thing:757336) to accomodate mounting holes on the [mechanical endstop](http://www.thingiverse.com/thing:4971) that comes with the [Folger Tech 2020 i3](http://folgertech.com/products/folger-tech-reprap-2020-prusa-i3-full-aluminum-3d-printer-kit) and wider [HK15178 servo](http://www.hobbyking.com/hobbyking/store/__16257__HK15178_Analog_Servo_10g_1_4kg_0_09s.html) servo horn.