such as :meth:`.Query.union` now handle the case where the embedded
SELECT statements need to be parenthesized due to the fact that they
include LIMIT, OFFSET and/or ORDER BY.   These queries **do not work
on SQLite**, and will fail on that backend as they did before, but
should now work on all other backends.
fixes #2528

to function for a many-to-one relationship.  The loader used an
API to place "None" into the dictionary which no longer actually
writes a value; this is a side effect of :ticket:`3061`.
- remove InstanceState._initialize() totally, it's used nowhere
else and no longer does what it says it does
- fill in fowards-port version ids throughout the changes for 1.0.9

without primary keys to be reflected as well as ensured that
a SQL statement involved in foreign key detection is pre-fetched up
front to avoid driver issues upon nested queries.  Fixes here
courtesy Eugene Zapolsky; note that we cannot currently test
Sybase to locally verify these changes.
fixes #3508  fixes #3509

`to_unicode` variable was created but was not used.

or other variable-length column type with unbounded length
by assigning the token ``"max"`` to the
length attribute of the string.   While using the ``"max"`` token
explicitly is supported by the SQL Server dialect, it isn't part
of the normal contract of the base string types, and instead the
length should just be left as None.   The dialect now assigns the
length to None on reflection of the type so that the type behaves
normally in other contexts.
fixes #3504

up SQLAlchemy's version detection under Python 3 and inadvertently
not using the correct unicode mode for Python 3.  This would cause
issues such as bound variables mis-interpreted as NULL and rows
silently not being returned.
fixes #3491

- add first-class "pytest" runner to setup.py, fixes #3489
- remove references to setuptools Feature and mark that "--without-cextensions"
 is removed, fixes #3500