licensed "under WTFPL unless otherwise noted".
- zbell function is Written by Jean-Philippe Ouellet <jpo@vt.edu>
- and available under the ISC license, taken from [[https://gist.github.com/jpouellet/5278239][hist gist on github]]
+ and available under the ISC license, taken from [[https://gist.github.com/jpouellet/5278239][his gist on github]]
- extract/ls_archive is from [[https://github.com/sorin-ionescu][Sorin Ionescu]] and available under the MIT
License.