Octicons by Github
https://octicons.github.com/

output icon - By Kirill Kazachek https://www.iconfinder.com/kirill.kazachek
font icon - By Dave Gandy http://fontawesome.io/
            License: http://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=OFL
snippet icon - by  Becris .  https://www.iconfinder.com/becris
               https://www.iconfinder.com/iconsets/essential-web-2
               License: Free for commercial use
