Massive scheduling changes (again). Not entirely complete, but getting closer. ...

Massive scheduling changes (again).  Not entirely complete, but getting closer.  Need to think about various scheduli...

Original commit message from CVS:
Massive scheduling changes (again).  Not entirely complete, but getting
closer.  Need to think about various scheduling plans that we might want
to produce, and figure out the rules for what is legal, and how to get
the results we need as far as the plan.