Note on 3.1 and 3.2 releases.

Author: tomchristie

docs/topics/3.0-announcement.md

@@ -34,6 +34,9 @@ Notable features of this new release include:
 * Support for overriding how validation errors are handled by your API.
 * A metadata API that allows you to customize how `OPTIONS` requests are handled by your API.
 * A more compact JSON output with unicode style encoding turned on by default.
+* Templated based HTML form rendering for serializers. This will be finalized as  public API in the upcoming 3.1 release.
+
+Significant new functionality continues to be planned for the 3.1 and 3.2 releases. These releases will present simple upgrades, without the same level of fundamental API changes necessary for the 3.0 release.
 
 Below is an in-depth guide to the API changes and migration notes for 3.0.