get_GSOD                Download and return a data.table object of GSOD
                        weather data
get_inventory           Download and return a data.table object GSOD
                        weather station data inventories
nearest_stations        Find nearest GSOD stations to a specified
                        latitude and longitude
print.GSODR.Info        Prints GSODR.info object.
reformat_GSOD           Tidy and return a data.table object of GSOD
                        weather from local storage
update_station_list     Download latest station list metadata and
                        update internal database
