This bug is for adding some code to allow multi-push comparisons. For this we'll need to add a secondary path while we develop it that is separate from the two-push system. As we expand on it, we may move the two-push system to the multi-push system.

We should add a --multi <TOTAL-RUNS> flag to enable this, and ensure that we have a comparator that has a method like setup_push(run_number, ...) to setup each of the pushes. The other arguments to the method should be the same as the two-push system.