Replicator 2/2X DuetWifi Configuration

Updated 04-06-2020: Config files updated for the latest Version 3.1.1 Firmware release.
(note that the 2nd extruder is disabled in the attached config. Uncomment relevant lines to enable it again)
Added config files for factory default Z Homing switch - NOTE: if used, Duet will ignore any probe inputs and home against the Z-Endstop switch that comes with the Rep2x by default (make sure it is wired up to the Z-Endstop pins on Duet like the X/Y endstop switches are)

This is part 3 of the Replicator 2/2X DuetWifi Upgrade series.
Part 1, 2 and 4 can be found here:

- Part 1: DuetWifi Installation and PanelDue Mount (https://www.thingiverse.com/thing:2428995)
- Part 2: Mini Differential IR Probe mount for Replicator 2X (https://www.thingiverse.com/thing:2475179)
- Part 3: DuetWifi Configuration files for Replicator 2X (https://www.thingiverse.com/thing:2475257)
- Part 4: Simplify3D Slicer Configuration for the Replicator 2X (https://www.thingiverse.com/thing:2476695)
- Part 5: E