Stevenson Screen - modular, customizable, snap together

A modular, customizable, snap together general purpose weather protector (aka [Stevenson screen](https://en.wikipedia.org/wiki/Stevenson_screen)) for sensors like my temperature and humidity sensor.

**Usage**: Open the `.scad` file and enter the bounding box of your sensor (or thing) you want to put inside the weather protector. Generate a top, middle, and bottom shell `.stl`. Print a top and a bottom and as many middle shells as the height of your sensor requires. You can use the included m