New features:
- https://github.com/anitagraser/movingpandas/pull/268 New add_angular_difference method
Includes fixes and enhancements for:
- https://github.com/anitagraser/movingpandas/pull/267 Note that direction values are [0, 360) in documentation
Behind the scenes:
- https://github.com/anitagraser/movingpandas/pull/269 Fixed python dependencies
- https://github.com/anitagraser/movingpandas/pull/269 Fixed read the docs build