FIX: threshold now utilizes multiprocessing_wrapper module to handle worker pools
FIX: threshold now utilizes multiprocessing_wrapper module to handle worker pools

https://github.com/rfaulkner/E3_analysis/issues/11

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