[NTG-context] supp-ran.lua makes code unable to work in ConTeXt

[Aditya Mahajan]

> If you or anyone else is going to play around with generating mazes,
> definitely take a look at http://www.mazesforprogrammers.com/
>
> and the live demos here: 
> https://weblog.jamisbuck.org/2011/2/7/maze-generation-algorithm-recap

A nice overview of the relationship with spanning tress (by the same author) http://www.jamisbuck.org/presentations/rubyconf2011/index.html

And another set of visualizations
https://bost.ocks.org/mike/algorithms/#maze-generation

Aditya