^^^^^^^^^^^^^^^^^^
- To improve readability, do not test the examples in the
documentation with Python 2.6.
- Code pathways that are specific to one Python version are marked
with `` pragma`` directives, and the collection of coverage
statistics ignores them as appropriate.
- Add support for Python 3.6.
- Implement `11`_: Take the absolute value of an interval.
- Provide a helpful message during installation if setuptools is
outdated (`13`_).
.. _11: https://github.com/taschini/pyinterval/issues/11
.. _13: https://github.com/taschini/pyinterval/issues/13