Added Django-wagtailmedium. (#43)

README.md

@@ -61,6 +61,7 @@ Awesome Wagtail [![Awesome](https://cdn.rawgit.com/sindresorhus/awesome/d7305f38
 - [wagtailembedder](https://github.com/springload/wagtailembedder) - Snippets embedder for Wagtail richtext fields.
 - [Wagtail TinyMCE](https://github.com/isotoma/wagtailtinymce) - A TinyMCE editor integration for Wagtail.
 - [Wagtail Froala](https://github.com/jaydensmith/wagtailfroala) - Extends Wagtail to use the Froala WYSIWYG editor in RichTextField/RichTextBlock.
+- [Wagtail Medium Editor](https://github.com/dperetti/Django-wagtailmedium) - A customizable Medium Editor for Wagtail, with link anchors support.
 
 ### Widgets