further interchangability for class properties in clause elements

[jek]

>>> print desc(Customer.c.name)
customers.name DESC
>>> print desc(Customer.name)
customers.name DESC

but

>>> print func.max(Customer.c.name)
max(customers.name)
>>> print func.max(Customer.name)
max(:max)

[Mike Bayer]

fixed in changeset:3020

[Mike Bayer]

Removing milestone: 0.4.0 (automated comment)