Wrap C++ object copy for Python

[Gustavo Carneiro]

In C++ we can do
   FooBar foo;
   FooBar bar = foo;
or:
   FooBar bar (foo);

Both of which make a class instance value copy, if the class supports it.

Mapping of this into Python is needed. Either this:
    bar = FooBar(foo)
or:
    bar = copy.copy(foo)

Or support both...

[Gustavo Carneiro (gjc)]

OK, "both" it is.