Raptus-article-gallery

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- Nothing changed yet.

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- Add support for plone.app.imaging scales to be able to use
`plone.app.imagecropping`__ [fRiSi]

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

- Add attributes ``data-title`` and ``data-desc`` to the image links that can be
used by JS Galleries to display title and descrition. [fRiSi]

- Add ``img_url`` key to the data-dictionary so customized templates can build
an image tag instead of beeing limited to what ``IImage.getImage(size)``
returns. [fRiSi]

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- Added italian translation [davidemoro]

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* Only show hidden images when in editing mode (introduced in raptus.article.core 2.0b13)

* Add a property ``gallery_rel_attribute`` to be able to use a js-gallery
product other than `Products.jsImagePopups`.

eg set it to ``prettyPhoto`` to use `collective.prettyphoto`.
[fRiSi]

* Added property to configure the maximum number of gallery items
to be displayed.
[fRiSi]

* For SEO reasons, the images link to article/image1/view now (used
to link to article/image1/image in preview size)

An additional javascript fixes the link for the javascript galleries.
[fRiSi]

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* Now using the show/hide functionality added in raptus.article.core 2.0b8
* Render XHTML valid page template
[saily]

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* fix franz translation