[idbox] Primary Extruder

This is a direct drive bowden extruder remodeled for deagostini idbox.
It cannot be used as a secondary extruder. (Because it contacts the Y axis bearing when mounted)

Remixed from: [Compact Bowden extruder by scarou](http://www.thingiverse.com/thing:669459)
Merged from: [[idbox] Filament Funnel Set](http://www.thingiverse.com/thing:1919662), [Pacman Helper Disk V2 by midniteandy](http://www.thingiverse.com/thing:112436)

##Updates
- 2017-01-29 Added Spring_Compressor.stl
- 2017-03-02 Added Extruder_Body_Disks_SupportV2.stl
- 2017-12-21 Added Spring_Compressor_V2.stl and Washer_Board.stl
- 2017-12-28 Added Spring_Compressor_V2.1.stl

##Requirements
- Use for extruder
- 1 x Stepper motor (included in the idbox kit)
- 1 x MK8 drive gear
- Outer diameter: 9mm
- Length: 11mm
- Hob diameter: 7mm
- Bore: 5mm
- 1 x 625ZZ bearing (or 625-2RS bearing)
- 1 x 608ZZ bearing (or 608-2RS bearing)
- 2 x M3x8mm pan head screws
- 2 x M3x10mm pan head