Solver for "general"-type noise missing...

[hanmingcr]

I was trying to use general noise with either sdeint or sdeint_adjoint. But I always get the error message below:

SDE has noise type general but solver only supports noise types ('additive', 'diagonal', 'scalar')

Would you mind implementing the corresponding solver?

Another question: what are the meanings of g_prod, gdg_prod and g_prod_and_gdg_prod?

Thanks