4.2.0
- added ArangoDBVersion.getLicense()
- added ArangoDB.getRole()
- added ArangoDBException.getException()
- added protocol switch (ArangoDB.Builder.useProtocol(Protocol))
- Protocol.VST = VeclocyStream (default)
- Protocol.HTTP_JSON = Json over HTTP
- Protocol.HTTP_VPACK = VelocyPack over HTTP