Release notes for 3.1.3

Author: xordoquy

docs/topics/release-notes.md

@@ -40,6 +40,23 @@ You can determine your currently installed version using `pip freeze`:
 
 ## 3.1.x series
 
+### 3.1.3
+
+**Date**: [4th June 2015][3.1.3-milestone].
+
+* Add `DurationField`. ([#2481][gh2481], [#2989][gh2989])
+* Add `format` argument to `UUIDField`. ([#2788][gh2788], [#3000][gh3000])
+* `MultipleChoiceField` empties incorrectly on a partial update using multipart/form-data ([#2993][gh2993], [#2894][gh2894])
+* Fix a bug in options related to read-only `RelatedField`. ([#2981][gh2981], [#2811][gh2811])
+* Fix nested serializers with `unique_together` relations. ([#2975][gh2975])
+* Allow unexpected values for `ChoiceField`/`MultipleChoiceField` representations. ([#2839][gh2839], [#2940][gh2940])
+* Rollback the transaction on error if `ATOMIC_REQUESTS` is set. ([#2887][gh2887], [#2034][gh2034])
+* Set the action on a view when override_method regardless of its None-ness. ([#2933][gh2933])
+* `DecimalField` accepts `2E+2` as 200 and validates decimal place correctly. ([#2948][gh2948], [#2947][gh2947])
+* Support basic authentication with custom `UserModel` that change `username`. ([#2952][gh2952])
+* `IPAddressField` improvements. ([#2747][gh2747])
+
+
 ### 3.1.2
 
 **Date**: [13rd May 2015][3.1.2-milestone].
@@ -206,6 +223,7 @@ For older release notes, [please see the version 2.x documentation][old-release-
 [3.1.0-milestone]: https://github.com/tomchristie/django-rest-framework/issues?q=milestone%3A%223.1.0+Release%22
 [3.1.1-milestone]: https://github.com/tomchristie/django-rest-framework/issues?q=milestone%3A%223.1.1+Release%22
 [3.1.2-milestone]: https://github.com/tomchristie/django-rest-framework/issues?q=milestone%3A%223.1.2+Release%22
+[3.1.3-milestone]: https://github.com/tomchristie/django-rest-framework/issues?q=milestone%3A%223.1.3+Release%22
 
 <!-- 3.0.1 -->
 [gh2013]: https://github.com/tomchristie/django-rest-framework/issues/2013
@@ -341,3 +359,22 @@ For older release notes, [please see the version 2.x documentation][old-release-
 [gh2863]: https://github.com/tomchristie/django-rest-framework/issues/2863
 [gh2868]: https://github.com/tomchristie/django-rest-framework/issues/2868
 [gh2905]: https://github.com/tomchristie/django-rest-framework/issues/2905
+<!-- 3.1.3 -->
+[gh2481]: https://github.com/tomchristie/django-rest-framework/issues/2481
+[gh2989]: https://github.com/tomchristie/django-rest-framework/issues/2989
+[gh2788]: https://github.com/tomchristie/django-rest-framework/issues/2788
+[gh3000]: https://github.com/tomchristie/django-rest-framework/issues/3000
+[gh2993]: https://github.com/tomchristie/django-rest-framework/issues/2993
+[gh2894]: https://github.com/tomchristie/django-rest-framework/issues/2894
+[gh2981]: https://github.com/tomchristie/django-rest-framework/issues/2981
+[gh2811]: https://github.com/tomchristie/django-rest-framework/issues/2811
+[gh2975]: https://github.com/tomchristie/django-rest-framework/issues/2975
+[gh2839]: https://github.com/tomchristie/django-rest-framework/issues/2839
+[gh2940]: https://github.com/tomchristie/django-rest-framework/issues/2940
+[gh2887]: https://github.com/tomchristie/django-rest-framework/issues/2887
+[gh2034]: https://github.com/tomchristie/django-rest-framework/issues/2034
+[gh2933]: https://github.com/tomchristie/django-rest-framework/issues/2933
+[gh2948]: https://github.com/tomchristie/django-rest-framework/issues/2948
+[gh2947]: https://github.com/tomchristie/django-rest-framework/issues/2947
+[gh2952]: https://github.com/tomchristie/django-rest-framework/issues/2952
+[gh2747]: https://github.com/tomchristie/django-rest-framework/issues/2747