Allow args to ``rwt.run`` function to be passed directly.
2.11
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Issue 1: Inject a sitecustomize into the install path to work around the lack of -nspkg.pth execution. Skip the execution on Python 3.3 and later, as it will degrade the behavior in those environments as indicated in 5.
2.10
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Issue 9: Intercept the ``--help`` argument if specified rather than passing that to pip install.
2.9
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Issue 8: Add a console entrypoint, so one can invoke simply ``rwt``.
2.8
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Issue 7: Extract entries from .pth files in the temporary install folder and include those values in PYTHONPATH when launching the subprocess.
2.7.1
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Issue 6: Only augment but don't replace PYTHONPATH.