Node.ext.directory

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- Nothing changed yet.

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- Fix deprecated imports.
[rnix]

- Add note about successor package.
[rnix]

----------------

- Replace deprecated use of ``Nodify`` by ``MappingNode``.
[rnix]

- Replace deprecated use of ``Adopt`` by ``MappingAdopt``.
[rnix]

---

- Python 3 support.
[rnix, 2017-06-06]

- ``fs_mode`` is read from filesystem if file or directory exists and
fs_mode not set explicitely.
[rnix, 2017-06-06]

- Remove ``backup`` option from ``IDirectory`` interface. It never really
worked properly and conceptually ``IDirectory`` is the wrong place for
handling backups of files.
[rnix, 2017-06-04]

---

- Introduce ``node.ext.directory.interfaces.IFile.direct_sync`` setting.
[rnix, 2017-01-30]

- Complete ``node.ext.directory.interfaces.IFile`` and
``node.ext.directory.interfaces.IDirectory`` to reflect implemented features.
[rnix, 2017-01-30]

- Move ``node.ext.directory.directory.MODE_TEXT`` and
``node.ext.directory.directory.MODE_BINARY`` to
``node.ext.directory.interfaces``.
[rnix, 2017-01-30]

-----

- Check whether directory to be peristed already exists by name as file in
``node.ext.directory.FileStorage.__call__``.
[rnix, 2015-10-05]

- Implement fallback to ``path`` in
``node.ext.directory.FileStorage.__call__`` if ``fs_path`` not exists.
[rnix, 2015-10-05]

- Implement fallback to ``path`` in
``node.ext.directory.FileStorage._get_data`` if ``fs_path`` not exists.
[rnix, 2015-10-05]

- Set initial mode with ``self.mode`` property setter instead of internal
``self._mode`` in ``node.ext.directory.FileStorage._get_mode``.
[rnix, 2015-10-05]