New features
------------
- Refactor :class:`tasks.snapshot`. Settings have been simplified and
code maintenance has been eased. *by Cyril Fournier*,
- Add new visualization :class:`visualization.Tree` for 2D, *by Pamphile Roy*,
- Add ``global_optimizer`` option in settings for Kriging, *by Pamphile Roy*,
- Move documentation to *read the docs*, *by Pamphile Roy*,
- Add documentation for MASCARET and PCE, *by Matthias De Lozzo*.
Enhancements
------------
- Export :class:`visualization.Kiviat` as a mesh, *by Pamphile Roy*,
- Some visualization for MASCARET, *by Sophie Ricci*.
Bug fixes
---------
- Point mixing when snapshots already exists, *by Pamphile Roy*,
- Outlier are computed only once in f-HOPs, *by Pamphile Roy*,
- PDF scaling, *by Pamphile Roy*,
- Legend list for forward compatibility with MPL, *by Pamphile Roy*,
- Range color bar, visualization ticks default, *by Pamphile Roy*,
- Driver exceptions, *by Pamphile Roy*,
- Encoding errors in schema with python 3.5, *by Pamphile Roy*,
- Settings checking was not effective, *by Pamphile Roy*.