Scalar - Extruder Holder improvement

This part is an improvement on the existing extruder holder.
It places the extruder body 45° from it's original prosition allowing a more natural way for the fillament to get inside the extruder.

This systems significantly reduced the probability of the filament breaking when left alone on the spool holder.

A must have if you already have a Scalar Family 3D printer.

# Updates:
2015.12.05 - Add a version with 30° angle that seems more natural that the other version with a 45° angle.
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