Wrote two test cases:
Wrote two test cases:

time to threshold metric - time diff for first to second edit for one user
experiment loader - writing aggregate metrics from a sample list

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