Pollution implementation seems to be out of date

[zachfi]

It appears that this API has been updated and the data object is no longer unmarshaled correctly due to struct changes.

https://openweathermap.org/api/air-pollution

[538023]

yes it looks very old the new url should point to "http://api.openweathermap.org/data/2.5/air_pollution"

[zachfi]

#106