Add vital information for S3 section

README.rst

@@ -145,6 +145,11 @@ Using S3
 ~~~~~~~~
 See http://django-storages.readthedocs.org/en/latest/
 
+**NOTE:** `django-ckeditor` will not work with S3 through `django-storages` without this line in `settings.py`:  
+
+```python
+AWS_QUERYSTRING_AUTH = False
+```
 
 If you want to use allowedContent
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~