Products.pythonscripts

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- Fix a serious error that prevents page templates from compiling
(`27 <https://github.com/zopefoundation/Products.PythonScripts/issues/27>`_)

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- Provide a single default script content template for Python 2 and 3

- Prevent deprecation warning by using ``importlib`` instead of ``imp``
(`24 <https://github.com/zopefoundation/Products.PythonScripts/issues/24>`_)

- Prevent syntax warning due to outdated default script content
(`26 <https://github.com/zopefoundation/Products.PythonScripts/issues/26>`_)

- Allow for entering a title when adding a Python Script
(`25 <https://github.com/zopefoundation/Products.PythonScripts/issues/25>`_)

- adding badges to the README for GitHub and PyPI

- Package metadata cleanups

- cleaned up tox test configuration

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- Specify supported Python versions using ``python_requires`` in setup.py
(`Zope481 <https://github.com/zopefoundation/Zope/issues/481>`_)

- Add support for Python 3.8

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- Show a message instead of exception for empty file upload
(`21 <https://github.com/zopefoundation/Products.PythonScripts/issues/21>`_)

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- Add support for Python 3.7.

- Drop support for Python 3.4.

- Force recompilation of scripts as the compiled code is now stored
on `__code__` instead of `func_code`.

- Add a Python 3 compatible default script.
(`10 <https://github.com/zopefoundation/Products.PythonScripts/pull/10>`_)

- Fix security declaration for ``Products.PythonScripts.standard`` which was
broken since version 3.0.
(`Zope209 <https://github.com/zopefoundation/Zope/issues/209>`_)

- Fix HTTP-500 error which occurred when entering code containing a
syntax error in a PythonScript. It is now rendered as error message like
other errors.
(`11 <https://github.com/zopefoundation/Products.PythonScripts/issues/11>`_)

- Update the tests to `RestrictedPython >= 4.0b4`, thus requiring at lest this
version.
(`17 <https://github.com/zopefoundation/Products.PythonScripts/pull/17>`_)

- Update HTML code of ZMI for Bootstrap ZMI.
(`16 <https://github.com/zopefoundation/Products.PythonScripts/pull/16>`_)

- Drop support for historical versions which no longer exist since Zope 4.0a2.

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- Add support for Python 3.4 up to 3.6.