Merge pull request #1 from mcnemesis/patch-1

Newer versions of Django no-longer include `update_wrapper`, as it's expected to be provided in the language's standard library.  Thanks to @mcnemesis

Author: defbyte

singleton_models/admin.py

@@ -2,7 +2,7 @@
 from django.utils.translation import ugettext as _
 from django.utils.encoding import force_unicode
 from django.http import HttpResponseRedirect
-from django.utils.functional import update_wrapper
+from functools import update_wrapper
 
 
 class SingletonModelAdmin(admin.ModelAdmin):