Parametric stackable workshop bins/boxes

Perfect little bins for holding stuff and organizing. There are three default variants and the `.scad` file is fully parametric, so you can customize it for whatever your needs are. The samples in the photos were printed using Polymaker CoPE on fast-draft mode with lightning infill. I recommend using an infill that will reinforce the walls if your model is over ~100mm. You can see the bowing that occurs on tall models if the walls are hollow in the photos.

This model was inspired by, but is not a direct remix of, [NullPointer](https://www.printables.com/@NuIIPointer)'s excellent [stackable bins](https://www.printables.com/model/1267886-stackable-bin-parametric).

#### Recommended Print Settings
* 0.4mm nozzle
* 0.2mm layer height
* 10% infill
* No supports
* Any filament that isn't flexible
* Print as oriented

#### Parameters
* `insideWidth`, `insideDepth`, `insid