Method: Return the human readable date of an activity which can be compared to other activity.
Method: Output human readable date.
Method: Check if there are items in a group.
Method: Count total items in a group.
Method: Check if current activity has action.
Method: Get the verb of current activity.
Method: Echo current activity verb.
Method: Return avatar of activity user.
Method: Prefetch question, answer, comment and user data.
Method: Pre fetch question and answers and cache them.
