Pyowm

- New features:
- Air Pollution data API endpoints: `OWM25.coindex_around_coords`, `OWM25.ozone_around_coords`
- UV data endpoint: `OWM25.uvindex_around_coords`
- Bugfixes:
- fixed `OWM25.is_API_online` method (was not working)
- more robust support for querying data on Unicode place names
- Enhancements: now datetime objects across all library are timezone-aware
- [PyOWM Slack team](http://pyowm-slackin.herokuapp.com/) is live!

- New features:
- `weather_at_ids`
- `weather_history_at_coords`
- introduced support for Python 3.4 and 3.5
- Bugfixes: full support for Unicode place names
- Enhancements:
- datetime representation of reception/reference times in `Weather`, `Forecast`, `History` objects
- better exception hierarchy
- Updated city ID registry files

Bugfix: no crashes when data about wind, snow and rain in JSON API responses are null

- Fix API_key issue with OWM API (was getting HTTP 401 on any API call)

- New feature: can now specify whether to use the pro OWM API version or not:


owm = OWM(subscription_type='pro', API_key='my-pro-api-key')

- Better support for Python 3 on `CityIDRegistry`
- Bug fixes on parsing of humidity, wind and visibility

Fixed bug on visibility distance parsing