Wasserstein

- C++ example added.
- Documentation updated.
- Small tweaks to some methods.

- Changes to some argument names.
- First version that EnergyFlow is designed to work with.
- First version with online documentation.

0.2.x

- First public version that should have reliable functionality.
- Tests written that cover most of the code.

0.1.x

- Rapid testing and development including getting the Python build system on [Travis-CI](https://travis-ci.org/github/pkomiske/Wasserstein).