License for the DEMZ Mandelbrot viewer

The DEMZ web pages, images, and program code (in Javascript) are made
available under a Creative Commons Attribution-NonCommercial 4.0
International License. License details are here:

  http://mrob.com/cc-license.html

DEMZ is based on an earlier web-based Javascript Mandelbrot viewer by
David Eck. It is located here:

  https://math.hws.edu/eck/js/mandelbrot/MB.html

In the index.html file at the beginning is the following license
statement:

  Web page written by David Eck, http://math.hws.edu/eck/index.html
  You can do anything you like with this web page and with the code, but
  if you use a substantial portion of it, you should include attribution.

DEMZ uses the "BigDecimal" arbitrary-precision arithmetic library At
the beginning of the file BigDecimal-all-last.js you will find the
license for BigDecimal. Read it and note that it has different
contributors who give permission in somewhat different ways. The
github repository for BigDecimal is here:

  https://github.com/latentflip/BigDecimal.js

which is a fork of the original Daniel Trebbien version, that
was formerly here:

  https://github.com/dtrebbien/BigDecimal.js

DEMZ was subsequently copied and then heavily modified by Robert
Munafo. That version is located here:

  http://mrob.com/pub/comp/eck-mandel/index.html

Along with most of the rest of the pages on mrob.com, at the bottom of
the web page you can find a license statement:

  This work is licensed under a Creative Commons
  Attribution-NonCommercial 4.0 International License. Details here.

with "here" being a link to mrob.com/cc-license.html