Ftw-events

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- Nothing changed yet.

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- Add more info to rss feed and use Event start date as pubDate. [mathias.leimgruber]
- Respect syndications settings on EventFolder RSS viewlet. [mathias.leimgruber]

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- Fix german formatted date translation for open-ended events [Nachtalb]
- Fix plone 5 upgrade step, which accidentally broke ftw.keywordwidget [mathias.leimgruber]
- Remove obsolete dependency from Plone 5. From now on install the "plone4" extra for Plone 4 installations [Nachtalb]
- Add possibility to show a leadimage within the block. [busykoala]

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- Add ftw.events portal_types translations to plone domain. [tinagerber]

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- Fix condition introduced in release 1.14.2. [mathias.leimgruber]

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- Improve reindex_indexes install hook - to not reindex if not necessary. [mathias.leimgruber]