mod. move get_minute_diff_result to module level namespace.  Rename class attributes.
mod. move get_minute_diff_result to module level namespace.  Rename class attributes.

wikimedia/analytics-user-metrics,rfaulkner/wikipedia_user_metrics,rfaulkner/wikipedia_user_metrics,wikimedia/analytics-user-metrics,rfaulkner/wikipedia_user_metrics,wikimedia/analytics-user-metrics