Greg's / Kuehling's / Chema's 3mm Dwarfstruder

__NOTE:__ Does not extrude nor contain dwarves!

I wanted to try out the 1:50 geared stepper from 2Engineers / TrinityLabs on a 3mm extruder and, after a bit of search through existing offerings, decided to roll my own.

It's based off of ChemaFuji's Wade Reloaded modified for the same stepper and i3, but with some modifications...

#### Notable changes:
- the i3 specific features are gone
- the extruder base has been stripped down to minimum possible size
- the filament hole has