Jsmetrics

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* Overhaul Kuang et al. 2014 method to work with plev-lat center check rather than lat-long jet center check.
* Use maximum filter from scipy ndimage for diagonal check from 'find_local_maxima_in_2d_dataarray_with_diagonals' used in M11 and K14
* Also makes a change to Manney et al. 2011 method if using diagonal check (should not affect results as it was working before)

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* Fix error when checking for plev units in data_utils
* Reduce README content

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* Update Manney et al. 2011 method to include 'check_diagonals' parameter
* Update Manney et al. 2011 method to select maximum windspeed if no cores found above threshold
* Add 'slice_array_by_index_breaks' to data utils
* Update examples of use and quick start table in docs
* Add check for plev units to data_utils
* Update Archer & Calidera to more properly check for whether data plev coords are Pa or hPa.
* Fix typos and clarify writing in docs

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* Fix CI and Github actions
* Finish overhaul the ReadTheDocs documentation in the package
* Confirm completed and to verify metrics
* Update Schiemann et al. 2009 method to run faster and introduce u_threshold parameter default
* Add more complete inline 'Steps' to each metric in the package for readability.
* Remove Screen & Simmonds and Local Wave Activity leftover code
* Update Manney et al. 2011 further with padding to capture cores near the edge of dataset

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* Changes:
* **MAJOR:** Rename to Barnes & Polvani 2014 and update tests and all mentions of
* Update Cattiaux method to deal with Matplotlib depreciation warning about using 'allsegs' or 'collections' in contour plot
* Add tests for new spatial utils method 'seperate_one_contour_into_line_segments'
* Add readthedocs.yml

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* Rename to Barnes & Polvani 2014 and update tests and all mentions of