Backwards Incompatibilities

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

- The ``repoze.bfg.traversal.model_path`` API now returns a tuple
  instead of a string.  Previously it returned a string representing
  the model path, with each segment name in the path joined together
  via ``/`` characters, e.g. ``/foo/bar``.  Now it returns a tuple,
  where each segment is an element in the tuple e.g. ``('', 'foo',
  'bar')`` (the leading empty element indicates that this path is
  absolute).  This change was (as discussed on the repoze-dev
  maillist) necessary to accomodate model objects which themselves
  have names that contain the ``/`` character.  See the API
  documentation for ``repoze.bfg.traversal.model_path`` for more
  information.

- The ``repoze.bfg.traversal.find_model`` API no longer implicitly
  converts unicode path representations into a UTF-8 string.  Callers
  should either use path tuples or use the guidelines about passing a
  string ``path`` argument described in its API documentation.

Features
--------

- The ``find_model`` API now accepts "path tuples" (see the above note
  regarding ``model_path``) as well as string path representations as
  a ``path`` argument.

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