Today key points
1. Separated subscription revision meta from whoosh index field names. Made the appropriate changes for indexing SUBSCRIPTION_IDS and SUBSCRIPTION_PATTERNS from the SUBSCRIPTIONS user profile meta.
2. Changed the user subscription functionality - https://codereview.appspot.com/11215045/
3. Updated the tests for determining subscribers to an item
4. Clean up in progress --> by changing the definition of the is_subscribed_to() we need to check on most of the templates
Tomorrow TODOs
1. Split the work done and post crs
2. Rewrite a validator for SUBSCRIPTIONS meta