create_test_dataset     Create training dataset on specific station for
                        prediction
create_train_dataset    Create training dataset on specific station for
                        prediction
create_train_model      Create random-forest training model for bicycle
                        rental prediction.
daily_bicycle_rental    Visualize amount of bicycle rental at each day
                        of week.
extract_features        Extract feature columns from train/test dataset
monthly_bicycle_rental
                        Visualize the change of bicycle rental amount
                        by temperature and each month.
predict_bicycle_rental
                        Predict hourly Demand of bicycle in 2015.
top10_paths             Visualize Top 10 Pathes that were most used
                        from 2013 to 2015.
top10_stations          Visualize top 10 stations that were most used
                        from 2013 to 2015.
