Make Fandango deterministic #406
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Even with a fixed random seed, Fandango may produce different results.
This has two causes:
evaluate_population_parallelseems to introduce non-determinism. I benchmarked this swiftly, and in my caseevaluate_populationwas even faster (0.02 sec vs 0.03 sec)This PR makes Fandango generate deterministic results for a given random seed.