GSL matrix transpose view

[E. Robert Tisdale]

Brian Gough wrote:

> The GSL vector matrix model is designed to be compatible with BLAS,
> which only supports a stride for the trailing dimension.
> That's a design decision based on the fact that
> we're working to the existing standards used by NAG, IMSL etc.

A transpose view is NOT incompatible with BLAS.
For example, the gsl_blas_dgemv function
would simply drop the CBLAS_TRANSPOSE_t argument
and examine the strides to determine whether to process
the matrix or it's transpose.