emberjs/website — pull request #1490 by davidpett (2014-05-01 21:42:35+00:00)
Title: added html5 download attribute to download links

according to https://developer.mozilla.org/en-US/docs/Web/HTML/Element/a#attr-download the download attribute tells your browser to download the file, rather than opening in a separate tab/window, which then requires you to save.