Today I Learn: ARIMA forecasting
- http://machinelearningmastery.com/arima-for-time-series-forecasting-with-python/
- https://www.digitalocean.com/community/tutorials/a-guide-to-time-series-forecasting-with-arima-in-python-3#step-4-—-parameter-selection-for-the-arima-time-series-model
- http://nbviewer.jupyter.org/gist/ChadFulton/5127108f4c7025ed2648