[Dune] Surface grid manager?

[Aleksejs Fomins]

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Dear Dune,

I was thinking about GSoC, and I had an idea.

Is there currently a grid manager, that can manage an unstructured
(triangular) grid in 3D, namely several regions in space, with only
surface discretized and not volume.

The reason I ask is because our colleagues in EPFL happen to have a
surface integral code which they might be interested to integrate to
Dune at some point, so it would be a useful addition to Dune.

Cheers,
Aleksejs
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