Pypicloud

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* Fix an exception when ``pypi.use_json_scraper = false`` (:issue:`250`)
* Allow passing in ``auth.signing_key`` as an environment variable (:issue:`247`)
* Add some documentation about the DynamoDB cache (:issue:`249`)

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* Drop support for Python 2 (:pr:`243`)
* Add support for package hashes (:pr:`244`)

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* Add support for Microsoft Azure Blob storage (:pr:`241`)

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* Add ``requests`` as a dependency (:pr:`240`)

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* Fix a bug with reloading Redis cache (:pr:`230`)
* More graceful handling of non-package files in GCS (:issue:`232`)
* Support for ``requires_python`` metadata (:pr:`234`, :issue:`219`)
* Add ``pypi.use_json_scraper`` setting for configuring
* Change default value of ``storage.redirect_urls`` to ``True``
* Add :ref:`auth.scheme <auth_scheme>` setting to customize password hashing algorithm (:issue:`237`)
* SIGNIFICANTLY LOWERED default password hashing rounds. :ref:`Read about why in the docs <passlib>`

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* Add option to use IAM signer on GCS (:pr:`226`)