Different backends?

[SoniEx2]

I need some Z-order-curve-based grids, some linear grids, etc, and I need them all to be usable in my thing through things like MyThing<ZOrderGrid<T>> and so on. This is so I can choose the optimal implementation for my use-case.

[bluss]

Needs big generalization before it can be possible. The crate currently abstracts over all data that can be addressed using the stride per axis indexing scheme, and not more.