Some additions to derived adjacencies

[chmerdon]

• possibility to store transposed adjacencies NodeCells, NodeFaces and NodeEdges
• docstrings for all derived adjacencies
• EdgeNodes now also instantiates parental adjacencies if it has a ParentGrid (like FaceNodes did already, implementing issue implement EdgeParents in instatiation of EdgeNodes #88)

[pjaap]

Nice. Can you add a Changelog entry and bump the minor version number? I think we can ignore the nightly failure.

[chmerdon]

ok,

another question: in FaceNodes instantiation also atranspose(xgrid[CellNodes]) is needed, should this be switched to grid[NodeCells] as well (triggering that this is saved always in the grid as soon as FaceNodes are involved)?

[pjaap]

Yes, sounds always reasonable to keep the result atranspose if we compute it.

[chmerdon]

Yes, sounds always reasonable to keep the result atranspose if we compute it.

Usually this step is a very fast and non-time-critical step in the other global adjacency instantiations where this is used. So not saving the same numbers twice might be also a reasonable default behavior.

[pjaap]

True. I tend to keeps thing as they are if we are not sure. Maybe add a comment at the specific code line?

[pjaap]

When adding this branch I get the warning

┌ ExtendableGrids
│  ┌ Warning: Replacing docs for `ExtendableGrids.BEdgeRegions :: Union{}` in module `ExtendableGrids`
│  └ @ Base.Docs docs/Docs.jl:243
└  

[j-fu]

Looks good to me.

We should notice the issue of "garbage collection" of grid items.
In the moment I have no idea how to proceed with this.

[chmerdon]

I opened issue #90 on garbage collection and will merge this PR now.