Adding two new APIs

[mo-robertneal]

Adding new APIs for extract_from_table and gradient_between_vertical_levels. Also, adding Robert Neal to the list of repository contributers.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.40%. Comparing base (84a8944) to head (a55914a).
Report is 66 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2091      +/-   ##
==========================================
+ Coverage   98.39%   98.40%   +0.01%     
==========================================
  Files         124      134      +10     
  Lines       12212    13254    +1042     
==========================================
+ Hits        12016    13043    +1027     
- Misses        196      211      +15     

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[cpelley]

extract_from_table as per

improver/improver/cli/extract_from_table.py

Line 43 in 347a8a4

from improver.utilities.extract_from_table import ExtractValueFromTable

gradient_between_vertical_levels as per

improver/improver/cli/gradient_between_vertical_levels.py

Lines 39 to 40 in 347a8a4

	from improver.utilities.gradient_between_vertical_levels import (
	GradientBetweenVerticalLevels,

[cpelley]

Looks good to me.

In future, ideally the table argument would be migrated to being an initialisation keyword argument (improver/cli/extract_from_table.py).
Also, the improvement of plugin UI to make use of as_cube, as_cubes and as_iterable. Such things facilitate using such plugins and no longer having to consider whether a cubelist or list of cubes or some variation is provided.