Zlatko minev patch 1 (#158)

* Update back_box_numeric.py - fix lint error for Qobj import

fix lint error for Qobj import

* Update plotting.py colors = None

fix lint

* Update ansys.py

* merge in (#157)

* Update README.md (#156)

* Update back_box_numeric.py - fix lint error for Qobj import (#155)

* Update back_box_numeric.py - fix lint error for Qobj import

fix lint error for Qobj import

* Update plotting.py colors = None

fix lint

* Update ansys.py

* Update the joining of `project_path` and `project_name` to pathlib convention (#154)

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Co-authored-by: Barkay Guttel <51173082+bguttel@users.noreply.github.com>

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Co-authored-by: Barkay Guttel <51173082+bguttel@users.noreply.github.com>