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]

- went through examples/ and cleaned out excess list() calls

become an externally usable package but still remains within the main sqlalchemy parent package.
in this system, we use kind of an ugly hack to get the noseplugin imported outside of the
"sqlalchemy" package, while still making it available within sqlalchemy for usage by
third party libraries.

no length is attempted to be emitted, same
way as MySQL. [ticket:2505]

- move testing.TestBase to test.lib.fixtures
- massive search and replace

- having occasional issues with BasicEntity grabbing, if it persists
may have to pass an explicit base class into setup_classes()/setup_mappers()

FB/Interbase version idents are parsed into a structure
such as (8, 1, 1, 'interbase') or (2, 1, 588, 'firebird')
so they can be distinguished. [ticket:1885]
- fixed relfection of the "autoincrement" flag against a default
placed on the column.

lets float() pass right through, thereby allowing
special values such as float('inf'). [ticket:2012]