fixed a bug I noticed where get_results_all returned an error if no replicates within a scenario ran SS properly. now should not stop if for some reason the folder for the scenario exists but the SS files are not available for any replicates. returns the true number of replicates for each scenario that ran properly
added parallel option to get_results_all plus some test code
Merge branch 'master' into update_get_results
Add microbenchmark tests of parallel options
Merge branch 'update_get_results'