Add some rather important forgotten release notes

CHANGELOG.txt

@@ -4,6 +4,8 @@ Changelog
 2.0 (xx.xx.xxxx) - IN DEVELOPMENT
 ~~~~~~~~~~~~~~~~
 
+ * Added support for Django 2.0 (Matt Westcott, Karl Hobley, LB (Ben Johnston), Mads Jensen)
+ * Reorganised module paths (Karl Hobley, Matt Westcott)
  * Removed support for Python 2.7, Django 1.8 and Django 1.10
  * Removed support for Elasticsearch 1.x
  * Moved Wagtail API v1 implementation (`wagtail.contrib.api`) to an external app (https://github.com/wagtail/wagtailapi_legacy) (Karl Hobley)

docs/releases/2.0.rst

@@ -10,6 +10,12 @@ Wagtail 2.0 release notes - IN DEVELOPMENT
 What's new
 ==========
 
+Added Django 2.0 support
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+Wagtail is now compatible with Django 2.0. Compatibility fixes were contributed by Matt Westcott, Karl Hobley, LB (Ben Johnston) and Mads Jensen.
+
+
 Reorganised modules
 ~~~~~~~~~~~~~~~~~~~