Add note about the file uploads code

ckan/controllers/storage.py

@@ -1,3 +1,10 @@
+'''
+
+Note: This is the old file store controller for CKAN < 2.2.
+If you are looking for how the file uploads work, you should check `lib/uploader.py`
+and the `resource_download` method of the package controller.
+
+'''
 import os
 import re
 import urllib