* Use more robust collection of child exit codes. Turns out that if there's enough pressure of the signalfd is fills up and needs extra ``os.waitpid()`` calls to collect the orphans.
1.0.0
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* Switch to `signalfd <https://pypi.python.org/pypi/signalfd>`_ (from the unmaintained `python-signalfd <https://pypi.python.org/pypi/python-signalfd>`_). * Switch to pytest.