Tap-py

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* Add support for Python 3.6.
* Drop support for Python 3.3 (it is end-of-life).
* Use Pipenv for managing development.
* Switch to pytest as the development test runner.

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* Add ``Parser.parse_text`` to parse TAP
provided as a string.

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* Remove nose plugin.
The plugin moved to the ``nose-tap`` distribution.
* Remove pytest plugin.
The plugin moved to the ``pytest-tap`` distribution.
* Remove Pygments syntax highlighting plugin.
The plugin was merged upstream directly into the Pygments project
and is available without tappy.
* Drop support for Python 2.6.

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* ``TAPTestRunner`` has a ``set_header`` method
to enable or disable test case header ouput in the TAP stream.
* Add support for Python 3.5.
* Perform continuous integration testing on OS X.
* Drop support for Python 3.2.

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* The ``tappy`` TAP consumer can read a TAP stream
directly from STDIN.
* Tracebacks are included as diagnostic output
for failures and errors.
* The ``tappy`` TAP consumer has an alternative, shorter name
of ``tap``.
* The pytest plugin now defaults to no output
unless provided a flag.
Users dependent on the old default behavior
can use ``--tap-files`` to achieve the same results.
* Translated into Arabic.
* Translated into Chinese.
* Translated into Japanese.
* Translated into Russian.
* Perform continuous integration testing on Windows with AppVeyor.
* Improve unit test coverage to 100%.

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* Provide a plugin to integrate with pytest.
* Document some viable alternatives to tappy.
* Translated into German.
* Translated into Portuguese.