* transport encryption (WIP - using fixed key, parsing/serialization works, SMP tests fail)
* transport encryption
* transport encryption: separate keys to receive and to send, counter-based IVs
* docs: update transport encryption and handshake
* transport encryption handshake (TODO: validate key hash, welcome block, move keys to system environment)
* change KeyHash type to newtype of Digest SHA256
* transport encryption: validate public key hash
* send and receive welcome block with SMP version
* refactor: parsing SMPServer
* remove unused function
* verify that client version is compatible with server version (major version is not smaller)
* update (fix) SMP server tests
* clrify encryption schemes
* increase SMP ping delay
* include authTag and msg size in encrypted message header, pad messages to fixed size
* use newtype for Key and IV bytestrings
* rename CryptoError constructors
* refactor Word to Int conversion
* refactor padding, replace padding character
* rfc corrections, comment
* rename aesTagSize -> authTagSize
* failing test
Evgeny Poberezkin