regexp apparently were not fully implemented correctly; while the
arguments were accepted, in practice they would have no effect;
this has been fixed.  Also in 0.8.3.
[ticket:2781]

MySQL.  for some reason set ordering was constant when testing mysqldb, but not
so with oursql.

reflected by the SQLite dialect; courtesy Russell Stuart.
[ticket:2764]

This controls the value of the ``retaining`` flag sent to the
``commit()`` and ``rollback()`` methods of the DBAPI connection.
Defaults to False.  Also in 0.8.2, where it defaults to True.
[ticket:2763]

actual mock objects from the mock library.  I'd like to use mock
for new tests so we might as well use it in obvious places.
- use unittest.mock in py3.3
- changelog
- add a note to README.unittests
- add tests_require in setup.py
- have tests import from sqlalchemy.testing.mock
- apply usage of mock to one of the event tests.  we can be using
this approach all over the place.

Postgresql dialect to no longer inject a hardcoded ``::timestamp``
or similar cast into the given expression, as this interfered
with types such as timezone-aware datetimes, but also
does not appear to be at all necessary with modern versions
of psycopg2.  Also in 0.8.2.
[ticket:2740]

backslashed quotes would not be escaped correctly when
using the "non native" (i.e. non-psycopg2) means
of translating HSTORE data.  Patch courtesy Ryan Kelly.
[ticket:2766]

on the warning so just dump it