------------------
* Don't memoize the persistent plone.registry utility. This avoids issues
with object access across different ZODB connections (see issue 2).
[lgraf]
* Avoid nesting internal term lists (see issue 3). [lgraf]
* Avoid indefinite growth of internal term lists (see issue 4). [lgraf]
* Split the ``README.rst`` up into several files. Put the testing
part in ``tests.rst`` in the main directory so this test file can also
be found when we are distributed on PyPI. [maurits]