| release='', versioninfo=('','',''), machine='') | 
(release, versioninfo, machine) with
  versioninfo being a tuple (version,
  dev_stage, non_release_version).
Entries which cannot be determined are set to ''.  All tuple
  entries are strings.
Documentation for the underlying gestalt() API is available online at http://www.rgaros.nl/gestalt/.
See About this document... for information on suggesting changes.