- Query() can be passed a "composite" attribute

- Query() can be passed a "composite" attribute
as a column expression and it will be expanded.
Somewhat related to [ticket:1253].
- Query() is a little more robust when passed
various column expressions such as strings,
clauselists, text() constructs (which may mean
it just raises an error more nicely).
- select() can accept a ClauseList as a column
in the same way as a Table or other selectable
and the interior expressions will be used as
column elements. [ticket:1253]
- removed erroneous FooTest from test/orm/query

-This line, and those below, will be ignored--

M    test/orm/query.py
M    test/orm/mapper.py
M    test/sql/select.py
M    lib/sqlalchemy/orm/query.py
M    lib/sqlalchemy/sql/expression.py
M    CHANGES