Hrosailing

- Fixed bugs with newer versions of `numpy` and `matplotlib`
- Improved Documentary in parts

- restructured modules to remove circular dependencies
- plotting of polardiagrams is now done via custom matplotlib projections supporting the typical matplotlib API
- tons of debugging
- added tons of testing (test-suite not complete yet)

Note that this version is not downwards compatible.
Due to the restructuring, almost all code that worked with previous versions needs to be overhauled.

Release contains:

- update of Citation
- bugfixes
- documentation fixes

Note that this version is not downwards compatible.
Code that worked in previous versions possibly has to be overhauled.

This version now contains:

- more sophisticated preprocessing using an extended pipeline model including support for multiple data sources, imputation, data extension, standardisation, quality metrics and more.
- globe models to handle geographic information and different projections of latitude/longitude coordinates. This is aimed to be combined with the `cruising` modul in later versions.
- more sophisticated weather models supporting the use of NETCDF files and the `meteostat` package.
- several bugfixes.
- several clarifications in the documentation.

Attention! This version is not completely backwards compatible to previous versions! In particular the API of `PolarPipeline`, `WeatherModel` and other classes changed. Please refer to the documentation if you run into any problems.