[Zope-CMF] Compound elements

[marc lindahl]

I added this comment to Jeffrey's proposal:

The CMFPhotoAlbum would benefit from being a compound type.  Thinking about
it gives some added perspective to the issue.

One of these photo albums consists of a (potentially heirarchical)
collection of photos and other photo albums.

The individual photo albums and photos may want to be searchable in addition
to the compound photo album.

A typical scenario when creating a photo album is to immediately upload a
bunch of photos into it.  So the creation workflow would need a loop
terminated by the user.

theCMFPhotoAlbum would definitely benefit (over the current implementation)
from searchability, and workflow (publishing, etc. all sub-objects at once).