Proof of concept for vector visualization

[pp-mo]

Investigate proof of concept for vector vizualisation.

Touch base with real use-cases:

• Chris Bunney
• Denis Sergeev
• Pete Sheridan

Aim for a self-contained gallery example for the community.

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update on streamlines ...

Consider streamline as a stretch goal (Stephen Worsley) collaboration.
I'm pretty confident now that streamlines are substantially more complicated
(because you require additional info to determine how they should be built).
So we now have a separate issue #675

[welcome]

📢 Nice one! Your first issue! Thanks for telling us how to improve geovista 📢

[pp-mo]

Coming along. See : #676

[bjlittle]

@all-contributors please add @pp-mo for ideas

[allcontributors]

@bjlittle

I've put up a pull request to add @pp-mo! 🎉