file 544.doc.rst:
explain everything much better - by :user:`passionate_technicalwriter`.file 544.feature.rst:
``tox --version`` now shows information about all registered plugins - by :user:`obestwalter`.file 571.bugfix.rst:
``skip_install`` overrides ``usedevelop`` (``usedevelop`` is an option to choose the
installation type if the package is installed and ``skip_install`` determines if it should be
installed at all) - by :user:`ferdonline`.