v0.1.0, 5/21/15 -- Initial release.
v0.1.1, 5/21/15 -- Updated readme, docstrings, and unit tests.
v0.1.2, 5/21/15 -- Added documentation and examples.
v0.1.3, 5/21/15 -- data_files missing.
v0.1.4, 5/21/15 -- Improved documentation and examples work on python 2.
