Add Open Graph Tags

[lucasrowe]

http://ogp.me/
http://cypressnorth.com/social-network-media-marketing/how-to-customize-preview-thumbnail-images-for-pages-on-your-website/

This could help with link thumbnail previews as well. It will be important to set different images and urls for different sites (especially sparklite)

<meta property="og:type" content="website" />
<meta property="og:url" content="http://dangersoffracking.com" />	
<meta property="og:image" content="http://dangersoffracking.com/thumb.png" />	
<meta property="og:site_name" content="Dangers of Fracking" />	
<meta property="fb:admins" content="lindadong" />