------------------------------
* Add support for batching, i.e. only fetch and parse items from Solr,
which are part of the currently handled batch.
[witsch]
* Fix quoting of operators for multi-word search terms.
[witsch]
* Use the faster C implementations of `elementtree`/`xml.etree` if available.
[hannosch, witsch]
* Grant restricted code access to the search results, e.g. skin scripts.
[do3cc, witsch]
* Fix handling of 'depth' argument when querying multiple paths.
[reinhardt, witsch]
* Don't break when filter queries should be used for all parameters.
[reinhardt, witsch]
* Always provide values for all metadata columns like the catalog does.
[witsch]
* Always fall back to portal catalog for "navtree" queries so the set of
required query parameters can be empty.
This refs http://plone.org/products/collective.solr/issues/18
[reinhardt, witsch]
* Prevent parsing errors for dates from before 1000 A.D. in combination
with 32-bit systems and Solr 1.4.
[reinhardt, witsch]
* Don't process content with its own indexing methods, e.g. ``reindexObject``,
via the `reindex` maintenance view.
[witsch]
* Let query builder handle sets of possible boolean values as passed by
boolean topic criteria for example.
[hannosch, witsch]
* Recognize new ``solr.TrieDateField`` field type and handle it in the same
way as we handle the older ``solr.DateField``.
[hannosch]
* Warn about missing search indices and non-stored sort parameters.
[witsch]
* Fix issue when reindexing objects with empty date fields.
[witsch]
* Changed the default schema for ``is_folderish`` to store the value. The
reference browser search expects it on the brain.
[hannosch]
* Changed the GenericSetup export/import handler for the Solr manager to
ignore non-persistent utilities.
[hannosch]
* Add support for `LinguaPlone`.
[witsch]
* Update sample Solr buildout configuration and documentation to recommend a
high enough default setting for maximum search results returned by Solr.
This refs http://plone.org/products/collective.solr/issues/20
[witsch]