https://modelviewculture.com/pieces/unlocking-the-invisible-elevator-accessibility-at-tech-conferences http://www.ashedryden.com/blog/increasing-diversity-at-your-conference
https://thoughts.duoconsulting.com/blog/planning-for-accessibility-drupal-midcamp-2016
http://yesct.net/making-midcamp-accessible
http://diversitycharter.org