Plone-folder

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

- Avoid dangerous memoization in the DefaultOrdering adapter.
[hannosch]

- Update license to GPL version 2 only.
[hannosch]

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

- Remove support for setting ``__parent__`` and ``__name__`` for content
providing ``IContained`` as it can cause severe performance issues when
used on Zope 2.x.
[witsch]

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

- Register all ordering adapter by default now that they can co-exist.
[witsch]

- Add `__getitem__` support to the default ordering adapter to help
previous/next support in `plone.app.folder`.
[witsch]

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

- Make sure order changes are persisted when using the partial ordering
adapter.
[hannosch, witsch]

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

- Make the dependency on `Products.CMFCore` a soft one.
[witsch]

- Added an 'unordered' adapter which can be used when no explicit ordering
is needed.
[davisagli]

- Allow the use of different named adapters to ``IOrdering``, with the name
determined by the folder's ``_ordering`` attribute.
[davisagli]

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

- Fix the WebDAV content creation process by properly returning a
``NullResource`` when required.
[optilude]