Version 0.2.2
- Fix major bug on 0.2.1 causing normal http request not working.

Version 0.2.1
- Allow user to add custom headers when requesting URL

Version 0.2.0
- Support HTTPS
- Add original_images attribute
- Refactor method converting relative url to absolute url
- Generic structure for metadata

Version 0.1.3
- Fix Gemfile

Version 0.1.2
- Modify xpath for fallback searching in <head> tag to work in un-wellformed xml format.

Version 0.1.1
- Use addressable gem to handle better url
- Check image urls to handle both relative and absolute urls.

Version 0.1.0
- Implement OpenGraph library