FolgerTech FT-5 Z Endstop

Work in progress, adjustable Z endstop for the FolgerTech FT-5

Added FT5_EndStopV2_AdjArm_Orig for those that were using the Thumbscrew version with a locked nut at the lower end to hold the screw while adjusting with the thumbscrew or to lock the screw in place after adjustment.

Replaced FT5_EndStopV2 with FT5_EndStopV2_AllParts (which includes the changes below)

Added FT5_EndStopV2_BaseB to replace the previous version. I had to file down part of the base at the endstop for the actuator to be exposed to the lever.

Added an V2 Adjustable Arm that uses a square nut to lock the thumbscrew against. Use FT5_EndStop_AdjustableArmB (update 10:51pm 04/25/2017 ET).

Version 2, FT5_EndstopV2.stl has a closer to 1:1 ratio on the lever, whereas the first version was a bit over 2:1.

UPDATE 01/09/2018: Version 3 is lower profile for those with hotends that give more Z height.