Ndarray ecosystem service

[bluss]

There's a few things we can do to help ndarray users and the users of crates using ndarray, in the whole Rust ecosystem.

An important general issue is - help updating for ndarray deprecations and porting to the latest version of ndarray, if needed.

Selected other issues, around the ecosystem(!) one could help with - please be respectful when contacting people in other projects:

• support writing Arrays with non-standard layouts aldanor/hdf5-rust#21