Initial commit of C support code for efficient computation of G array.
Initial commit of C support code for efficient computation of G array.

othercriteria/StochasticBlockmodel,othercriteria/StochasticBlockmodel,othercriteria/StochasticBlockmodel,othercriteria/StochasticBlockmodel,othercriteria/StochasticBlockmodel,othercriteria/StochasticBlockmodel