Numerics Approximations for phi and g of Voronoi Model

voronoiEulerMethod is used to plot phi, which is our laplace transform
of g. gapprox2 is then used to plot g from our data obtained from
voronoiEulerMethod. Right now, I have voronioEulerMethod coded so that
it does not plot phi, but returns data for plotting g in gapprox2.