Add printf debugging to storage base

Signed-off-by: martin f. krafft <madduck@madduck.net>
diff --git a/reclass/storage/__init__.py b/reclass/storage/__init__.py
index c5660ae..b13826b 100644
--- a/reclass/storage/__init__.py
+++ b/reclass/storage/__init__.py
@@ -7,11 +7,15 @@
 # Released under the terms of the Artistic Licence 2.0
 #
 
-import time
+import time, sys
 
 def _get_timestamp():
     return time.strftime('%c')
 
+def vvv(msg):
+    print >>sys.stderr, msg
+    pass
+
 class NodeStorageBase(object):
 
     def __init__(self, nodes_uri, classes_uri):