Parametric box with interlocking lid

This is a parametric customizable box that I designed in OpenSCAD to allow me create enclosures mainly for PCBs and small object, with a screwless lid that simply clacks in place.

Customizable features:
* Create box, lid or both
* Dimensions
* Wall thickness
* Corner radius
* Lid thickness
* Lid ledge depth
* Lid lip tolerance
* Holes can be enabled independently on lid, sides and bottom, with separated border offsets
* Hole diameter
* Hole separation
* Alternating hole patterns

Can be used also as a library for other designs (as I did for my [Sonoff R3 minimal enclosure](https://www.thingiverse.com/thing:4116985)).