Newt-db

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- Fixed: Newt DB didn't work with RelStorage 2.1.

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- Fixed: When arguments are omitted, there were errors because
psycopg2 was trying to do substitutions anyway and choking on ``%``
characters in ``like`` queries.

- Fixed: Connection.search_batch didn't allow arguments to be omitted.

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- The ``newt.db.search`` module has a new ``read_only_cursor``
function for obtaining a `database cursor
<http://initd.org/psycopg/docs/cursor.html>`_ for selecting data and
for using the `cursor's mogrify method
<http://initd.org/psycopg/docs/cursor.htmlcursor.mogrify>`_.

- The helpers for setting up full-text search indexes now accept a
config argument to specify the name of a PostgreSQL full-text search
configuration.

- The batch search methods (``search_batch``, and ``where_batch``) now
allow the arguments parameter to be omitted, which is useful when
substitutions have been be applied with a `cursor mogrify method
<http://initd.org/psycopg/docs/cursor.htmlcursor.mogrify>`_ before
calling them.

- The search methods (``search``, ``search_batch``, ``where`` and
``where_batch``) now accept binary queries. This is allow
substitutions to be applied with a `cursor mogrify method
<http://initd.org/psycopg/docs/cursor.htmlcursor.mogrify>`_ before
calling them.

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- Serialization of persistent object references and intra-record
references (used only when there are cycles) was simplified and made
easier to use.

Note: The change to intra-object references is backward
incompatible, however, intra-record cycles, and thus the use of
intra-record references, are extremely rare and it isn't thought
that this change will affect anyone. If this causes problems,
please `create an issue <https://github.com/newtdb/db/issues/new>`_.

The change to persistent references was made in a backward-compatible
way, but the backward compatibility support will be dropped in Newt
DB version 1.

- Added a data-transformation option:

transformer
Callable to transform data records after they've been converted to
JSON.

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- Added an API for following database changes.

- Exposed JSON conversion as an API that can be used to for other
applications than updating the newt table, like updating external
indexes.

- Created a JSON conversion object to support conversion customization.

- Added `zodburi
<http://docs.pylonsproject.org/projects/zodburi/en/latest/index.html>`_,
making it easier to use Newt DB with applications like `Pyramid
<http://docs.pylonsproject.org/projects/pyramid/en/latest/>`_ that
use zodburi.

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- Fixed a packaging bug.