Add some way of checking the options that have been used to generate the solver

[pablokrupa]

The toolbox allows the user to not include all options in the structures provided to spcies_gen_options(). Any non-provided option is given a default value. It would be useful for the user to have some way of receiving a copy (or some verbose) indicating which options were used, so that he/she can check that the correct options were used.