See README.unittests for information on how to run
the tests.  [ticket:970]

- quote flag propagates to _Label, [ticket:1045]

 - @unsupported now only accepts a single target and demands a reason
   for not running the test.
 - @exclude also demands an exclusion reason
 - Greatly expanded @testing.requires.<feature>, eliminating many
   decorators in the suite and signficantly easing integration of
   multi-driver support.
 - New ORM test base class, and a featureful base for mapped tests
 - Usage of 'global' for shared setup going away, * imports as well

0.4 development continues at /sqlalchemy/branches/rel_0_4

tests extend from either TestBase or ORMTest, using additional mixins for
special assertion methods as needed

- Importing testenv has no side effects- explicit functions provide similar behavior to the old immediate behavior of testbase
- testing.db has the configured db
- Fixed up the perf/* scripts

omitting modules from sqlalchemy.__all__...

2. compiler names changed to be less verbose, unused classes removed.
3. Methods on Dialect which return compilers, schema generators, identifier preparers
have changed to direct class references, typically on the Dialect class itself
or optionally as attributes on an individual Dialect instance if conditional behavior is needed.
This takes away the need for Dialect subclasses to know how to instantiate these
objects, and also reduces method overhead by one call for each one.
4. as a result of 3., some internal signatures have changed for things like compiler() (now statement_compiler()), preparer(), etc., mostly in that the dialect needs to be passed explicitly as the first argument (since they are just class references now).  The compiler() method on Engine and Connection is now also named statement_compiler(), but as before does not take the dialect as an argument.

5. changed _process_row function on RowProxy to be a class reference, cuts out 50K method calls from insertspeed.py