- Backport fixes from master regarding URL decoding.  URL segments are
  no-longer "double-decoded" during traversal and when encountered in a route
  subpath (or other star-arg pattern).  As a result, a new API named
  ``pyramid.traversal.traversal_path_info`` was added to the system.  This
  function accepts an already-URL-decoded string and returns a tuple of
  Unicode objects.  This API is used internally by Pyramid in all places that
  ``pyramid.traversal.traversal_path`` used to be used.  The
  ``traversal_path`` function remains for backwards compatibility, however,
  and can still be used when a path is encoded.  See
  https://github.com/Pylons/pyramid/issues/349 for more information.

Closes #349.