Enable remote transfers

[DavidHuber-NOAA]

Description
To allow pushing data from one system to another, a secure interface tool (e.g. with scp or sftp) should be developed to allow transfers from one system to another.

Requirements
A class developed with methods to send or receive files, archives, directories, (and more?) from/to another system.

Acceptance Criteria (Definition of Done)
Tests are developed for each new method and all tests pass.

(Optional): Suggest A Solution
Something similar to how hpss.py works, but the Executable should be either scp or sftp or something similar (globus?). It would probably be useful to include a basic communication test when instantiating the Executable to verify that all certificates/handshakes are valid before attempting to transfer anything.