Added Implementation

[primeobsession]

Hi!

I added a link to an OpenGraph service that I have been improving for 3 years now. The service reads Open Graph tags on a page and infers values of any tags that are missing.

The service is a simple REST API. I have recently started adding client libraries ( https://github.com/primeobsession/opengraph-io ) and plan to continue adding them.

Just over 96% of the users use the free version of the service and I would love to increase the overall user base to help pay for server costs!

Thanks!

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