* Refactor the catalog optimization to use a more generic API to hook itself in Zope. This API can be used by other optimizations, reducing the cost of having multiple ones active at the same time.
3.0
----------------
* Fix a bug in the catalog optimitization.
* Fix incomplete interface declaration.
3.0c1
------------------
* Improve content walking tree utilities.
* Implement a content queue for cataloging content inside a transaction (speed optimization).
* Move ``UnicodeSplitter``, used by the catalog from Silva.
* Update services APIs.
* Improve tests.
3.0b1
------------------
* Update catalog, version_status is renamed to publication_status.
* Support for automatic service installation when the root is added.