Queue Method
Prepares and queues the message to the specified directory.
Syntax
public func queue(directory: String) throws -> Void
Remarks
Invoking Queue will prepare and queue the AS1 message. It will be signed if SigningCert is set, encrypted if RecipientCert is set, and compressed if CompressionFormat is set. A receipt will be requested if MDNTo is set. The queued message can then be sent by invoking ProcessQueue.