6-panel metrics through time plot for richness, latitude-richness correlation, MRD-richness slope, beta, PSV-richness slope, and gamma; shows expected curves for 3 values of sigma_E: 1, 3, 9; currently it does this only for temperate origin simulations, with tropical origin sims commented out for noisiness of plots
x-axis was scaled differently for sigma = 1 previously since those sims are run for 100k compared to 30k for other sims; now x-axis is the same for all