New upstream version.

debian/changelog

+django-model-utils (2.3.1-1) unstable; urgency=medium
+
+  * New upstream version.
+  * Swap maintainer and uploaders. Maintainer now set to DPMT.
+
+ -- Brian May <bam@debian.org>  Mon, 12 Oct 2015 16:28:31 +1100
+
 django-model-utils (2.0.3-2) unstable; urgency=low
 
   * Python3 package.

debian/control

 Source: django-model-utils
 Section: python
 Priority: extra
-Maintainer: Brian May <bam@debian.org>
-Uploaders: Debian Python Modules Team <python-modules-team@lists.alioth.debian.org>
+Maintainer: Debian Python Modules Team <python-modules-team@lists.alioth.debian.org>
+Uploaders: Brian May <bam@debian.org>
 Build-Depends: debhelper (>=8.1.0), dh-python,
  python-all, python-setuptools, python-django,
  python3-all (>= 2.6.6-3~), python3-setuptools, python3-django