Move to version 1 protocol. Implement msgpack. Refactoring

* This spec implements the verison 1 protocol
* Wire compatible with the python version
* Removed xdr implementaion
* Wrote msgpack implementation (upsteam msgpack does not yet provide
  support for the published msgpack standard, which the python version
  does, so writing our own seemed reasonable given that we use a small
  subset.
* In line with the new simplified datatypes, The container type
  VerifiableMessage is removed.
* Simplified the Signer API (signer now signs arbitrary byte arrays)
Move [de]serialization code into a separate CrtAuthCodec class

* Somewhat improved testing
* MiniMessagePack now throws RuntimeException instead of Error when
 when failing to write to an ByteArrayOutputStream
Formatting fix overly long lines and qualified exception classes in javadoc comments
Merge pull request #16 from noaresare/pr/new-protocol-version

Move to version 1 protocol. Implement msgpack. Refactoring