Mould master openscad library

Simple library for making masters for moulds from other openscad models.

This library will be maintained on [github](https://github.com/beanz/mould-master-scad). To use the library just do:

use
master() {

}

Enjoy!

Thanks to my youngest son for encouraging me to make this.

Thanks to Richard Horne (RichRap) for his [fabulous Trio project](http://richrap.blogspot.co.uk/2016/02/using-3d-printing-for-taste-of.html) write up that I was able to find the perfect sil