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* Add an optional 'brains' parameter to the query builder to obtain
results not wrapped as an IContentListing.
[davisagli]
* Declare all dependencies in setup.py to resolve a dependeny problem in
test setups, where the Plone stack isn't fully loaded.
[thet]
* Add a "today" date operator
[esteele]
* Internationalize strings in the registry.
[davisagli]
* Change relative date searching to be "N days" string based rather than
datetime based.
[esteele]
* Handle empty values on relative date fields.
[esteele]