Node.ext.fs

-----

- 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]

-----

- Remove deleted keys from internal reference after ``__call__`` in order
to return the correct result when adding a file or directory with the same
key again.
[rnix, 2015-07-20]

-----

- Use try/except instead of iteration to check whether directory child already
in memory.
[rnix, 2015-05-12]

-----

- Always use ``os.chmod`` for setting directory permissions, not only if
already exists.
[rnix, 2015-03-03]

---

- Introduce ``fs_mode`` on directories and files.
[rnix, 2015-03-03]

---

- Return empty list in ``File.lines`` if no data.
[rnix, 2015-02-18]

- Consider filesystem encoding. Defaults to UTF-8.
[rnix, 2015-02-18]

- Tree locking on modification.
[rnix, 2014-09-02]

- Prevent empty keys in ``__setitem__``.
[rnix, 2014-09-02]

- Use ``plumbing`` decorator.
[rnix, 2014-08-25]