Proxied old-style classes can't be instantiated

[Andrew Wilkins]

>>> conn = pushy.connect("local:")
>>> conn.execute("""\
... class X:
... def __init__(self):
... print 123
""", locals=locals_)
>>> locals_["X"]()

Traceback (most recent call last):
  File "test_local.py", line 14, in <module>
    locals_["X"]()
TypeError: 'ObjectProxy' object is not callable

[Andrew Wilkins (axwalk)]

The problem is that old-style class objects don't have a __call__ method, whereas new-style classes do. I have added a new proxy type (oldstyleclass) which adds a __call__ method that calls the remote constructor.