New upstream release.

debian/changelog

@@ -1,3 +1,9 @@
+dulwich (0.12.0-1) UNRELEASED; urgency=medium
+
+  * New upstream release.
+
+ -- Jelmer Vernooij <jelmer@debian.org>  Sun, 13 Dec 2015 15:34:54 +0000
+
 dulwich (0.11.2-1) unstable; urgency=medium
 
   [ Jelmer Vernooij ]