- Update to 1.6.1
* use PyType_Ready for all types: bitarray, bitarrayiterator,
decodeiterator, decodetree, searchiterator.
- Update to 1.6.0
* add `decodetree` object, for speeding up consecutive calls
to `.decode()` and `.iterdecode()`, in particular when dealing
with large prefix codes.
* add optional parameter to `.tolist()` which changes the items
in the returned list to integers (0 or 1), as opposed to
Booleans.
* remove deprecated `bitdiff()`, which has been deprecated since
version 1.2.0, use `bitarray.util.count_xor()` instead
* drop Python 2.6 support.
* update license file.