Review ALL Alterers
- does it make sense for the swap-assignment alterer to swap genes on different chromosomes?
- Robin: probably not
- which alterer is leading to a successful schedule how often?
- add a new closed-interval shift alterer?
- does it make sense to have "shift" as just a special case of "assign", and "shift-to-zero" as a special case of "shift"?
- shift is more than just re-assignment, since there is max-shift (and it makes sense to have it, too)