1. I changed the crude, usually wrong, heuristic for finding a file family
name to another crude, usually wrong, heuristic.  Maybe it will work a
little better.
2. In two cases I removed the "reduced_" prefix to the new name of a
reduced variable.  In those cases, used for climatologies, I decided that
the user actually will look at it and that the prefix would be confusing
and troublesome.  I still like using the prefix to reduce ambiguities in
case these are ever used for some sort of name-based lookup.  So I left
it in the other cases which don't need immediate attention.  This
requires more thought.
Add another standard filter, and another way to parse a filter string.
- update to work with other diagnostics changes
- keep better track of names, using a correct name in the output variable
- write some useful global file attributes