Pull description information from meta tags

Tries to extract a description from the page by looking at meta and og description tags
Add thumbnail to toggles when sites have them

Displays a small thumbnail above each toggle that comes from either og:image or twitter:image meta tags.
Restore old No description found message

When there is no meta tags, keep the old No Description found message
Merge pull request #228 from xeoncore/ogimage

Pull in extra meta data for links