Universal Parametric Hook

This is a parametric hook that can be customized with different parameters for all types of hooks! Can be customized directly from customizer or by downloading OpenScad.

I've divided the hook into 3 sections: top, center, bottom:

- Top and bottom each include __2 curved sections (inner and outer)__. Each curved section contain variables responsible for altering __angle__ and __radius__ of the curve.

- Top, center, and bottom each have __1 straight bar__ section that can __length__ altered.

- All sections share a __width__(perpendicular axis to the curve/bars) and __depth__(or extruded height) variable.

Credits to Alex English for the [Wedge module](http://www.thingiverse.com/thing:40245).