------------------
* Added ``--cov-fail-under``, akin to the new ``fail_under`` option in `coverage-4.0`
(automatically activated if there's a ``[report] fail_under = ...`` in ``.coveragerc``).
* Changed ``--cov-report=term`` to automatically upgrade to ``--cov-report=term-missing``
if there's ``[run] show_missing = True`` in ``.coveragerc``.
* Changed ``--cov`` so it can be used with no path argument (in which case the source
settings from ``.coveragerc`` will be used instead).
* Fixed `.pth` installation to work in all cases (install, easy_install, wheels, develop etc).
* Fixed `.pth` uninstallation to work for wheel installs.
* Support for coverage 4.0.
* Data file suffixing changed to use coverage's ``data_suffix=True`` option (instead of the
custom suffixing).
* Avoid warning about missing coverage data (just like ``coverage.control.process_startup``).
* Fixed a race condition when running with xdist (all the workers tried to combine the files).
It's possible that this issue is not present in `pytest-cov 1.8.X`.