3.1.0

• Improved the demo displaying more http request info
• Improved support for image sites like bibo.kz #214
• Removed spreaker adapter, because it uses oembed
• Fixed linkpulse provider
• Added support for json feeds
• New option url_blacklist to do not follow some urls as canonical #221
• Re-run the canonical url using a try/catch to avoid throw exceptions #228
• Added support for facebook events #227