Small fixes to bugs in the streaming handler for use with magic and radosgw.

storage/local.py

@@ -1,5 +1,7 @@
 import os
 import shutil
+import hashlib
+import io
 
 from storage.basestorage import BaseStorage
 
@@ -39,7 +41,7 @@ class LocalStorage(BaseStorage):
 
   def stream_read_file(self, path):
     path = self._init_path(path)
-    return open(path, mode='rb')
+    return io.open(path, mode='rb')
 
   def stream_write(self, path, fp, content_type=None):
     # Size is mandatory