box API for SCAD

## Introduction

This thing is just a SCAD script that provide an API to manipulate parts of a models by placing them relative to each other.

When writing SCAD models i found out that the result scripts are not readable. Even when i read them myself many days later i don't understand what i wrote and why i wrote them this way.

The main reason is that i use a lot of constant values computed or measured on parts in real life and even with comments in code this is hard to read. Furthermore