Maze cylinder generator

This is based on [Maze generator, pure OpenSCAD](https://www.thingiverse.com/thing:1185425). You may use this as a base for creating a random maze pen holder (may be found in [Random maze container generator](http://www.thingiverse.com/thing:1229469)):

Or a random maze saucer (may be found in [Random maze container generator](http://www.thingiver