-----------------------------
- Improve Python 3 compatibility: Make sure sequences passed to ``concatenate()`` are lists.
- Submit test coverage from Travis CI to Coveralls.io.
- Increase test coverage of ``concatenate()``, ``Spinner()`` and ``Timer()``.
- Use ``assertRaises()`` instead of ``try``, ``except`` and ``isinstance()`` in test suite.
.. _Release 1.8.1: https://github.com/xolox/python-humanfriendly/compare/1.8...1.8.1