Acro

Bug fixes

* Fix Python virtual environment creation.
* Pin Python `acro` package to v0.4.6 for stability.

* First version.

Changes:
* Add missing value handling ([59](https://github.com/AI-SDC/ACRO/pull/59))
* Add a new line between statsmodel tables when writing csv ([60](https://github.com/AI-SDC/ACRO/pull/60))
* Fix problems with NaNs in masks ([63](https://github.com/AI-SDC/ACRO/pull/63))
* Fix loading existing results ([64](https://github.com/AI-SDC/ACRO/pull/64))

Changes:
* Add explicit stack level to warnings ([45](https://github.com/AI-SDC/ACRO/pull/45))
* Separate analytic results from JSON files ([46](https://github.com/AI-SDC/ACRO/pull/46))
* Add timestamps to the output names and append the new outputs to the existing JSON file ([51](https://github.com/AI-SDC/ACRO/pull/51))
* Add functionality for users to rename outputs ([52](https://github.com/AI-SDC/ACRO/pull/52))
* Add functionality to add comments to outputs ([54](https://github.com/AI-SDC/ACRO/pull/54))
* Add functionality to add currently unsupported outputs ([58](https://github.com/AI-SDC/ACRO/pull/58))

Changes:
* Package for PyPI
* Clean tests

Changes:
* Fix complex table checking