#246 PhotoAlbum doesn't support DublinCore

[Gerry Kirk]

Because PhotoAlbum subclasses SkinnedFolder, there is
no dublin core support. As a result, when a photo album
is stored inside an I18NLayer, no date info gets
stored, and object isn't found in a catalog search,
except by Manager role.

I changed SkinnedFolder to PloneFolder to fix my problem

[Christian Heimes]

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If you can provide a fix which doesn't require Plone
including a migration for old albums I'll add DC support for
CMFPhotoAlbum. Without migration for old ablums I can't
simply subclass DefaultDublinCoreImpl because it would break
for old versions.

[Gerry Kirk]

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Why did you close this bug? It is still an issue. Sorry, I
don't know how to go about writing a migration. My fix was a
hack, because I don't know the proper way to fix it.