Raptus.article.listings

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- Nothing changed yet.

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- Add properties ``teaser_listingleft_scale``, ``teaser_listingright_scale``
and ``teaser_listingcolumns_scale`` that allow to use plone.app.imaging.

This allows us to use `plone.app.imagecropping`_ [fRiSi]

.. _plone.app.imagecropping: https://pypi.python.org/pypi/plone.app.imagecropping


.. ATTENTION:: requires raptus.article.teaser >= 2.0b12

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* Only show hidden articles when in editing mode (introduced in raptus.article.core 2.0b13)
* Added alternating listing and refactored viewlet class simplify extending

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* Now using the show/hide functionality added in raptus.article.core 2.0b8

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* Added French translations

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* Set zip_safe flag to False