Update Document Request/Response models to have a Document object with an Encryptable<String> body.
Pulled AesEncryptable config code for testing into a base class that extends BaseSerialization.
Updated DocumentResponse/Request tests for Document with Encryptable body -- removed coverage for serialization, from now on we'll test that in specific
revert to using BaseSerialization methods for de/serialization
Merge pull request #15 from kryptnostic/feature/encrypt-documents

Feature/encrypt documents