v1.0.0

  The jump to version 1.0.0 signify the module is considered mature. It's
  being used now by at least two large enterprises and no big incompatible
  change is predicted in the near future. We'll try to adhere to the
  Semantic Versioning (http://semver.org/) specification from non on.

  [New features]

  - The githooks.group option is now treated as a multi-valued option,
    allowing one to specify groups with more than one definition.

  [Documentation]

  - The TUTORIAL was revised and improved, with new sections for Git server
    and Gerrit adminitrators.