Parametric Stackable Drawers

I was printing a set of [Husker83's stackable drawers](https://www.thingiverse.com/thing:4613719), when I realized I needed a different drawer height and divider configuration. After an hour struggling with Blender and Tinkercad, and nearly throwing my laptop across the room in frustration, I decided to return to my coder roots and build something similar in OpenSCAD.

Now you can make your own drawer set in any (reasonable) size, with any (reasonable) dimensions and regular divider configuration. Each drawer (and corresponding base) can also be a different height, but as long as all your drawers have the same width and depth, you can stack them to the ceiling. Note that you'd be specifying the _internal_ dimensions of the drawer, which I think are far more useful than giving external dimensions.

Like Husker83's Thing, you need to set the following in your slicer for best results:
* Line width: **0.5mm** (using a 0.4mm nozzle)
* Layer height: **0.28mm**

Unlike Husker83's Thin