Support for Linear Algebra Operators

[stoni]

• [ ] iarray_linalg_inverse
• [ ] iarray_linalg_dot
• [ ] iarray_linalg_svd
• [ ] iarray_linalg_lstsq
• [ ] iarray_linalg_det
• [ ] iarray_linalg_qr
• [ ] iarray_linalg_choleski
• [ ] iarray_linalg_lu
• [ ] iarray_linalg_solve
• [ ] iarray_linalg_norm
• [ ] iarray_linalg_eigen

If possible implement both functions with MKL

[stoni]

We should implement that only for plain-buffers in Version 1