basic feed rebuilding

repub/postprocessing.py

@@ -0,0 +1,11 @@
+class SortRssItems:
+    def __init__(self, file, feed_options):
+        self.file = file
+        self.feed_options = feed_options
+        self.buffer = ""
+
+    def write(self, data):
+        self.buffer += data.decode("utf-8")
+
+    def close(self):
+        self.file.write(sorted)