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* Upgrade step: Assign "Can download ePub" permission to
CommonEditor
* Upgrade step: Within "Plone > Site setup > Add-ons" click on
upgrade button available for eea.epub
* Change: Renamed epub_view to download.epub
[voineali refs 20393]
* Feature: Added "Can download ePub" and "Can customize ePub" permissions
[voineali refs 20436]