scottmac/opengraph — pull request #9 by MitchellMcKenna (2013-02-18 20:09:37+00:00)
Title: Fallback to use image_src if ogp::image isn't set

- Some websites (eg. imgur.com) don't have OGP tags but they do
indicated an image associated with the page using image_src meta tag.
- Facebook.com's oEmbed also falls back on this if OGP data isn't available ([stackoverflow](http://stackoverflow.com/a/7623986/120210)).