Collective-themesitesetup

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- Add support for populating persistent (plone.resource) resource directories
[datakurre]

- Refactor permission support to use zope.app.localpermission
[datakurre]

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- Add support for TTW custom permissions
[datakurre]

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- Add support for populating Dexterity content type models from theme
from ``./models/Xxxxxx.xml``
[datakurre]

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- Fix issue where translationdomain internals prevented updating existing
catalog
[datakurre]

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- Add support for registering i18n message catalogs directly from theme
from ``./locales/xx/LC_MESSAGES/yyyyy.po``
[datakurre]

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- Add support for exporting and importing plone.app.contenttypes -content
[datakurre]