Unix-only module 'fcntl' is now imported within GnuPG.run within try-except-ImportError to make this module importable under Windows, to allow Windows-developer reimplement GnuPG.run with althouth-Windows modules
import of Unix-only module 'readline' now within try-except-ImportError to make this module importable under Windows
added 'markupsafe' and 'nose' to the required third party packages, but without version number