Documentation for linking, *-static and *-system features

[termoshtt]

[g-bauer]

Hi,
is there any progress towards 0.13.0? Having these features would allow for a way more flexible usage of ndarray-linalg in test environments.

[thecooldrop]

This would be really good, as I am unable to use the library at all following the official instructions. Interesstingly I was able to use inv() only after I replaced the openblas and blas-src with lapack-src.