Parametric handle

A simple but fully customizable parametric handle.

### Building

This thing is designed in SolidPython which itself is a code generator for OpenSCAD.
Building is therefore a two-step process, first you run the python script and then render the resulting scad-file with OpenSCAD.
Feel free to import it into your own SolidPython project.

### Parameter description

def handle(w=100, h=35, d=15, r=20, screw_d=3.5, screw_delta=0.35, screw_l=17):

`w` = width measured from hole to hol