Use a very large cache for the processed files -- this eliminates the issue where the processed tree was alternating between early and late entries.
If numEntries passed into Refitter is -1, continue processing until tinput returns NULL instead of an entry.
Rework MakeInFiles_sample to be usable for generating big jobs covering the whole dataset.
Note that it will need to be run at SLAC, due to how NERSC ROOT was compiled.