Refactor mmcs algorithm

[vfisikop]

The mmcs (sampling + rounding) algorithm is mainly implemented in the bindings of dingo (mainly in https://github.com/GeomScale/dingo/blob/develop/dingo/bindings/bindings.cpp#L207)

A more natural way it to be implemented in volesti and imported in dingo with a binding function. Alternatively it could be another sampling method that can be called by apply_sampling https://github.com/GeomScale/dingo/blob/develop/dingo/bindings/bindings.cpp#L86

[ASHISHBVB]

If this issue has already been solved by PR #108, then why is it still open?
If not, I have raised a PR against this issue could you please review it
@vfisikop @vissarion @hariszaf @TolisChal