Improve build and installation process (#69)
* Update installation to rely only on pyproject and setup.py
* Update readthedocs settings
* Change to python github actions
* Correct error ci.yml
* Switch to only using poetry
* Update Github action to use setup-poetry
* Ensure action installs poetry dependencies'
* Upgrade gryffin
* Fix installation and build
* Fix readthedocs install
* Wipe build env on readthdocs and downgrade python ver
* Update README.md with badges and fix typo in pyproject.toml
* Update README
* Finish redo of Github actions workflow to include test,build & publish
* Correct ci.yml
* Test publish step
* Comment out pytest
* Move get_version to main folder
* Add job dependency
* Bump version in preparation for new release and clean up README
* Enable automated insertion of open in colab badge
