* Add `error_on_missing_years` parameter to the model as well.
0.3.9
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* Add `error_on_missing_years` parameter to `load_isd_hourly_temp_data`, if True, an ISDDataAvailableError exception is raised if there are years, within the requested dates that are unavailable. If False, the values in the missing years are set to nan.
0.3.8
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* Update internal database (2018-08-31).
0.3.7
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* Allow using non-normalized dates, (i.e., dates with non-zero minutes or seconds that do not fall exactly on an hour or a day boundary) to access `station.load_isd_hourly_temp_data`, `station.load_isd_daily_temp_data`, and `station.load_gsod_daily_temp_data`.
0.3.6
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* Bug fix in ISDStation initialization with handling of null fields.
0.3.5
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* Added the `rank` parameter in the data field for a station distance EEWeatherWarning.