Bug#794007: haskell-hmatrix: add the gsl binding

[PICCA Frederic-Emmanuel]

> @picca, are you a user of the hmatrix package, or did you report the
> bug for other reasons?

Hello, I am using the gsl binding for my hkl project.
I use haskell in order to prototype my code then I do the implementation in C
(because for my job, I need to provide a C library which compile with a plain RHEL 4...)

Cheers

Frederic