@hackage hmatrix-sundials0.19.0.0

Currently only an interface to the Runge-Kutta methods: ARKode

The interface is almost certainly going to change. Sundials gives a rich set of "combinators" for controlling the solution of your problem and reporting on how it performed. The idea is to initially mimic hmatrix-gsl and add extra, richer functions but ultimately upgrade the whole interface both for sundials and for gsl.