Plone-app-iterate

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Bug fixes:

- Use ``get_installer`` in general upgrade step. [maurits]

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Bug fixes:

- Fix 54: Cancelling a check out from the original deletes the original.
[jensens]

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Bug fixes:

- Do not depend on Products.Archetypes anymore. (part 3)
[tomgross]

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Bug fixes:

- Do not depend on Products.Archetypes anymore. (part 2)
[tomgross]

- Remove explicit dependency on ZODB3
[tomgross]

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Bug fixes:

- removed "change portal events" permission
[kakshay21]

- Prevent using queryUtility with name=None
[pbauer]

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New features:

- Add each field label for the diff view, fix visual diff link and add break
[frapell]

Bug fixes:

- Change ``IIterateSettings.checkout_workflow_policy`` to ASCIILine,
as required by ``Products.CMFWorkflowPolicy``.