Add wagtail-generic-chooser (#116)

README.md

@@ -78,6 +78,7 @@ Awesome Wagtail [![Awesome](https://cdn.rawgit.com/sindresorhus/awesome/d7305f38
 - [wagtail-markdown](https://github.com/torchbox/wagtail-markdown) - Markdown fields and blocks for Wagtail.
 - [wagtail-autocomplete](https://github.com/wagtail/wagtail-autocomplete) - Autocompleting choosers for `ForeignKey`, `ParentalKey`, and `ManyToMany` fields.
 - [wagtail-instance-selector](https://github.com/ixc/wagtail-instance-selector) - A `ForeignKey` widget to create and select related items. Similar to Django's `raw_id_fields`.
+- [wagtail-generic-choooser](https://github.com/wagtail/wagtail-generic-chooser) - provides base classes for building chooser popups and form widgets for the Wagtail admin, matching the look and feel of Wagtail's built-in choosers for pages, documents, snippets and images.
 
 ### StreamField