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* Use ``unicodify()`` on exceptions and subprocess outputs (thanks to
`nsoranzo`_) `Pull Request 944`_
* Do not override ``None`` with empty string (thanks to `ic4f`_). `Pull Request
950`_
* Update Docker template for training material generation (thanks to
`bedroesb`_). `Pull Request 958`_
* Add support for suite of repos with different owners (thanks to `nsoranzo`_).
`Pull Request 959`_
* Link for collection details updated in the docs (thanks to `martin-raden`_).
`Pull Request 963`_
* Move most tests to Python 3.7, drop Python 3.4 (thanks to `nsoranzo`_).
`Pull Request 964`_
* Remove confusing warning `Pull Request 966`_
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