deprecations per [ticket:1498]:

deprecations per [ticket:1498]:

- deprecated PassiveDefault - use DefaultClause.
- the BINARY and MSBinary types now generate "BINARY" in all
cases.  Omitting the "length" parameter will generate
"BINARY" with no length.  Use BLOB to generate an unlengthed
binary column.
- the "quoting='quoted'" argument to MSEnum/ENUM is deprecated.
It's best to rely upon the automatic quoting.
- "shortname" attribute on bindparam() is removed.
- fold_equivalents flag on join is deprecated (will remain
until [ticket:1131] is implemented)
- "scalar" flag on select() is removed, use
select.as_scalar().
- 'transactional' flag on sessionmaker() and others is
removed. Use 'autocommit=True' to indicate 'transactional=False'.
- 'polymorphic_fetch' argument on mapper() is removed.
Loading can be controlled using the 'with_polymorphic'
option.
- 'select_table' argument on mapper() is removed.  Use
'with_polymorphic=("*", <some selectable>)' for this
functionality.
- 'proxy' argument on synonym() is removed.  This flag
did nothing throughout 0.5, as the "proxy generation"
behavior is now automatic.
- Passing a single list of elements to eagerload(),
eagerload_all(), contains_eager(), lazyload(),
defer(), and undefer() instead of multiple positional
-args is deprecated.
- Passing a single list of elements to query.order_by(),
query.group_by(), query.join(), or query.outerjoin()
instead of multiple positional *args is deprecated.
- query.iterate_instances() is removed.  Use query.instances().
- Query.query_from_parent() is removed.  Use the
sqlalchemy.orm.with_parent() function to produce a
"parent" clause, or alternatively query.with_parent().
- query._from_self() is removed, use query.from_self()
instead.
- the "comparator" argument to composite() is removed.
Use "comparator_factory".
- RelationProperty._get_join() is removed.
- the 'echo_uow' flag on Session is removed.  Use
logging on the "sqlalchemy.orm.unitofwork" name.
- session.clear() is removed.  use session.expunge_all().
- session.save(), session.update(), session.save_or_update()
are removed.  Use session.add() and session.add_all().
- the "objects" flag on session.flush() remains deprecated.
- the "dont_load=True" flag on session.merge() is deprecated
in favor of "load=False".
- passing an InstanceState (internal SQLAlchemy state object) to
attributes.init_collection() or attributes.get_history() is
deprecated.  These functions are public API and normally
expect a regular mapped object instance.
- the 'engine' parameter to declarative_base() is removed.
Use the 'bind' keyword argument.