What's Changed
* Add plotly extras to readthedocs requirements by eleftherioszisis in https://github.com/BlueBrain/NeuroR/pull/109
* Fix unravel using path distance & refactor implementation by arnaudon in https://github.com/BlueBrain/NeuroR/pull/104
**Full Changelog**: https://github.com/BlueBrain/NeuroR/compare/v1.6.1...v1.6.2