--------------------
Added
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- Add an optional encryption layer that uses ``pynacl`` to deliver baseline confidentiality.
To take advantage of the new feature, just use ``Crypto-`` classes instead of the casual ones.
The cryptographic keys generated are meant to be used only during a single connection, for
forward secrecy. However, one can also force usage of a specific private key; see the constructor
of ``CryptoConnection`` for more details.
Changed
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- Support for OSes other than Linux is currently limited because of ``pynacl``'s restricted availability.
- Update and clarify specification of sequence numbers.
Fixed
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- Minor fixes affecting docstrings and memory usage.
- Improved packaging.