setdefault method does not return a value but None

[yflau]

I think the setdefault method is a similar method of dict, but it does not return a valid value, so it is strange.

>>> from hat_trie import Trie
>>> t = Trie()
>>> t.setdefault(u'a', 1)

>>> d = {}
>>> d.setdefault(u'a', 1)
1

[kmike]

Yes, you're right. This could be easy to fix (see https://github.com/kmike/hat-trie/blob/master/src/hat_trie.pyx ) - pull requests are welcome!

[kmike]

Could you please add yourself to README.rst under "Contributors" section?