Update admin.py compatibility with Django 1.6

removed defaults parameter in get_urls method that crashes the SingletonModelAdmin Class

Author: javiercf

singleton_models/admin.py

@@ -18,7 +18,7 @@ def has_delete_permission(self, request, obj=None):
         return False
 
     def get_urls(self):
-        from django.conf.urls.defaults import patterns, url
+        from django.conf.urls import patterns, url
 
         def wrap(view):
             def wrapper(*args, **kwargs):