Compotime

* Add test to check base series invariance.
* Remove regularization of covariance matrix.
* Improve example.
* Update README.

What's Changed
* Added installation instructions.
* Added build and codecov badges in README.
* Allowed normal pandas Index.
* Configured codecov.
* Correctly formated docstrings in numpydoc style.
* Improved error handling.
* Updated authors & maintainers.
* Renamed functions to improve code readability.

Initial development release