Pyexistdb

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* Basic support for preceding/following/preceding-sibling/following-sibling
queries when returning additional fields from a query via XmlModel.
* Bugfix: support xml returns for xpaths ending with node() or *

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* New method for sorting a :class:`eulexistdb.query.QuerySet`
by a raw XPath, for those cases when the desired sort xpath cannot be
specified as an :mod:`xmlmap` field:
:meth:`eulexistdb.query.QuerySet.order_by_raw`
* The Django manage.py script for managing eXist-DB index configuration
files now takes optional username and password credentials, for use
with sites that run in guest mode or with limited access.
* bugfix: :class:`~eulexistdb.query.QuerySet` greater than and less than
filters no longer assume numeric values should be treated as numbers,
to allow comparison of string values of numbers.
* bugfix: :class:`~eulexistdb.query.Xquery` now correctly generates
xqueries with more than one where statement.

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* New filters and operators supported on :class:`eulexistdb.query.QuerySet`:
* ``exists`` - filter on the presence of absence of a node
* comparison operators ``gt``, ``gte``, ``lt``, ``lte``
* Support for excluding documents using all existing filters
with new method :meth:`eulexistdb.query.QuerySet.exclude`.

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* Support for restricting xqueries to a single document in
:class:`eulexistdb.query.QuerySet` with ``document_path`` filter.

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* Development requirements can now be installed as an optional requirement
of the eulexistdb package (``pip install "eulexistdb[dev]"``).
* Unit tests have been updated to use :mod:`nose`
* Provides a nose plugin to set up and tear down an eXist database collection
for tests, as an alternative to the custom test runners.

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* Update to latest released version of :mod:`eulxml` (0.18.0) with
backwards-incompatible DateField/DateTimeField change.