'Set the Key class associated with this bucket.  By default, this
would be the boto.s3.key.Key class but if you want to subclass that
for some reason this allows you to associate your new class with a
bucket so that when you call bucket.new_key() or when you get a listing
of keys in the bucket you will get an instances of your key class
rather than the default.
:type key_class: class
:param key_class: A subclass of Key that can be more specific'

def set_key_class(self, key_class):

    self.key_class = key_class
