Collective.formcriteria

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* Merge collective.catalogexport to support CSV export of collection
based user-submitted queries [rossp]

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* Ensure that only formFields are taken from the request
* Fix ignored integer range criteria (reported by SimO)
* Use a browser layer (suggested by optilude)
* Add ids and CSS classes to the batch_macro sort links (aaronv)
* Fix a bug with the "operator" field. Thanks to Mauro!

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* Move package to src directory and fix testing buildout
* Register criteria AT types using the right package name
* Fix a bug with the JavaScript that narrows the criteria types by
index/field
* Use separate meta_types instead of overwriting the ATCT meta types,
may be backwards incompatible for previous installations

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* Add a layout that lists items grouped by the sort used
* Fix KeyError: u'unsorted' bug for existing ATTopics as reported by
jonstahl

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* Fix widget JavaScript and CSS for search form portlet

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* Clarify selected sort
* Make portlet usable outside the context of the collection
* Fix portlet class
* Don't render hour and minute fields on date