Update to 0.9.1

Upstream changes:
Release 0.9.1 (2012-06-17)
==========================

* docutils/setup.py

  - Fix [ 3527842 ]. Under Python3, converted tests and tools were
    installed in the PYTHONPATH. Converted tests are now
    stored in ``test3/``, tools no longer need conversion.

    If you installed one of Docutils versions 0.7 ... 0.9 with
    ``setup.py install`` under Python3, remove the spurious
    ``test/`` and ``tools/`` directories in the site library root.

* docutils/test/

  - Make tests independent from the location of the ``test/`` directory.
  - Use converted sources (from the ``build/`` directory) for tests under
    Python3.

* docutils/tools/

  - Make tools compatible with both, Python 2 and 3 without 2to3-conversion.

* docutils/io.py

  - Fix writing binary data to sys.stdout under Python3 (allows
    ``rst2odt.py`` to be used with output redirection).

* docutils/parsers/rst/directives/misc.py

  - Fix [ 3525847 ]. Catch and report UnicodeEncodeError with
    ``locale == C`` and 8-bit char in path argument of `include` directive.

* docutils/test/alltests.py

  - class `Tee`: catch UnicodeError when writing to "ascii" stream or
    file under Python3.

(wen)