ROOT output structure

[betchart]

If I were to do it again, I would enumerate the steps, and make their output live in enumerated non-telescoping directories, like:

/00_master/
/01_histogrammer/
/02_selection1/
/03_histogrammer/

To remind you, the current structure is in telescoping subdirectories, like:

/master/histogrammer/selection1/histogrammer

This is a pain to browse, and has no technical merits beyond the enumerated directory structure.