testdata.duck

[Jaymon]

as discussed in #32 I think I should add a testdata.duck that can take an object and produce an object similar to the passed in object, but it should also have the ability to convert it into a dict and things like that, so if I had something like:

class Foo(object):
    bar = 1
    che = 2

I could do this:

f = Foo()
print(f.bar) # 1

duck = testdata.duck(f)
print(duck.bar) # 1
print(duck.duckdict["bar"]) # 1

You could have a whole host of duck* methods on the duck-typed class