Say

Tweaks and testing for new version 1.4 of underlying ``options``
module.

New ``options`` version returns support for Python 2.6.

Reorganized documentation structure. Updated some setup
dependencies.

Instituted integrated, multi-version coverage testing with tox,
pytest, pytest-cov, and coverage. Initial score: 86%.

Updated ``SayReturn`` logic, which was broken, in order to support
an upgrade of ``show``

Added ``sep`` method for separators.

Some code cleanups and a few additional tests.Ã¥

Officially switched to YAML-format Change Log (``CHANGES.yml``)

Code cleanups.