Add Turbo Colormap, please

[Mike7L]

Turbo is an improvement over Jet: https://ai.googleblog.com/2019/08/turbo-improved-rainbow-colormap-for.html
Python version here: https://gist.github.com/jlmelville/be981e2f36485d8ef9616aef60fd52ab

[bpostlethwaite]

Cool thanks - right here is condensed version of said colormap:
https://gist.github.com/mikhailov-work/ee72ba4191942acecc03fe6da94fc73f

[bpostlethwaite]

I'll see if I can get around to this sometime this quarter

[sreyemnayr]

Would this do the trick? Or does it need to be a smaller array?

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