Merge pull request #44 from bbayles/version-4.0.0

Notes for version 4.0.0

Merge pull request #36 from bbayles/version-3.1.1

Release notes for 3.1.1

Merge pull request #32 from bbayles/version-3.1.0

Bump to version 3.1.0

Merge pull request #28 from dw/version-3.0.0

Version 3.0.0

Merge pull request #23 from dw/version-2.2.0

Prepare for 2.2.0 release

Merge pull request #8 from dw/quality-control

Quality control (flake8, Travis CI, and coveralls)

issue #5: bump package version for PyPI

Migrate README from Google code.