optimize facebook preview

[jmbh]

in many blogs, when posting a link to a post into facebook, one gets a nice preview with thumbnail & short text. this does not work for the OSC blog, however, that would be nice because it makes the content more visible.

[shaunagm]

Thanks, @jmbh! I agree. If you (or anyone else!) would like to work on this, I'm happy to help you do so.