* Allowed '/' in protocol name
* Added SymmetricState.GetHandshakeHash()
* Added CipherState.SetNonce()
* Unittests to ensure that each of above is working
Closes#3
* 2.1 version of pyca/cryptography got released. Version bumped
* Python 3.5 support reintroduced, as we are now using BLAKE from
Cryptography, not hashlib
* Removed hashlib references, uncommented Cryptography references.
* Enum fix for python 3.5 compat
Closes#9