HotFix: Fix timeline cache for signed-in user

Fix #286

Deployment: http://cz-july2013-javierluraschi-fixes.azurewebsites.net/
Code Review: http://mrccodereview.cloudapp.net/ui#review:id=1129

Scenario: Anonymous user modifies a collection; however, changes take 5 minutes to replicate.

Defect: Timeline cache was being applied always for the anonymous user.

Fix: The rule "Apply cache when the user is not the owner of the collection" applyes even for the anonymous user.