Sourcepredict

**Sourcepredict release with JOSS article.**
Various updates and small fixes after JOSS reviewers comments.

- Package architecture switched for using Setuptools
- Various small fixes (removing usunsed import, fixing deprecated methods)
- Publish to conda and pypi action

Changelog
- Switch MDS implementation for [skbio](http://scikit-bio.org/docs/0.5.4/generated/generated/skbio.stats.ordination.pcoa.html) to [sklearn](https://scikit-learn.org/stable/modules/generated/sklearn.manifold.MDS.html)
- Add `all` to `-kne` to use all neighbors in training dataset for KNN source proportion estimation
- Code cleanup
- Github actions to build and upload new conda package from release
- Remove probability recalibration for KNN source estimation

Conda packages
- [OSX-64](https://github.com/maxibor/sourcepredict/blob/master/conda/osx-64/sourcepredict-0.1.1-0.tar.bz2)
- [LINUX-64](https://github.com/maxibor/sourcepredict/blob/master/conda/linux-64/sourcepredict-0.1.1-0.tar.bz2)
- [LINUX-32](https://github.com/maxibor/sourcepredict/blob/master/conda/linux-32/sourcepredict-0.1.1-0.tar.bz2)

Conda packages
- [OSX-64](https://github.com/maxibor/sourcepredict/blob/master/conda/osx-64/sourcepredict-0.1-0.tar.bz2)
- [LINUX-64](https://github.com/maxibor/sourcepredict/blob/master/conda/linux-64/sourcepredict-0.1-0.tar.bz2)
- [LINUX-32](https://github.com/maxibor/sourcepredict/blob/master/conda/linux-32/sourcepredict-0.1-0.tar.bz2)