Adding wagtail-schema.org (#17)

README.md

@@ -109,6 +109,7 @@ Awesome Wagtail [![Awesome](https://cdn.rawgit.com/sindresorhus/awesome/d7305f38
 - [Wagtail Analytics](https://github.com/tomdyson/wagalytics) - A Google Analytics dashboard in your Wagtail admin.
 - [Django Wagtail Feeds](https://github.com/chrisdev/django-wagtail-feeds) - Add support for RSS Feeds, Facebook Instant Articles and Apple News Publisher to your Wagtail CMS Projects.
 - [Wagtail Themes](https://github.com/moorinteractive/wagtail-themes) - Site-specific theme loader for Wagtail.
+- [wagtail-schema.org](https://github.com/takeflight/wagtail-schema.org) - Schema.org JSON-LD tags for Wagtail sites.
 
 ## Tools