Return gzip urls.

pipeline/storage.py

@@ -79,6 +79,12 @@ class GZIPMixin(object):
                 gzipped_path = self.save(gzipped_path, gzipped_file)
                 yield gzipped_path, gzipped_path, True
 
+    def url(self, name, force=False):
+        url = super(GZIPMixin, self).url(name, force)
+        if matches_patterns(name, self.gzip_patterns):
+            return "{0}.gz".format(url)
+        return url
+
 
 class NonPackagingMixin(object):
     packing = False