[CoMISo] NProblemGmmInterface

Hi everyone,

as a first test of this mailing lists usefulness I would like to ask you all if you are using the gmm interface (NProblemGmmInterface). Maintaining both the NProblemInterface and the NProblemGmmInterface for a solver seems to be unnecessary overhead. Having some solvers in CoMISo that are implemented for the NProblemInterface and some that are implemented for the NProblemGmmInterface is counter-productive to the idea that CoMISo should allow to easily exchange solvers for a given problem. So, if there is no good reason to keep the Gmm interface, I would like to remove it in an upcoming release of CoMISo.

Kind regards, Max