- The RowTuple object returned by Query(*cols) now

- The RowTuple object returned by Query(*cols) now
features keynames which prefer mapped attribute
names over column keys, column keys over
column names, i.e.
Query(Class.foo, Class.bar) will have names
"foo" and "bar" even if those are not the names
of the underlying Column objects.  Direct
Column objects such as Query(table.c.col) will
return the "key" attribute of the Column.