Histogram Naming Convention

Attributes to include in histogram names in order of usage:

1. cpm/cmm/jem/ppm/rod
2. em/had/layerSum
3. 1d/2d/
4. etaPhi
5. tt/jetEl/roi/thresh
6. adc/lut (ppm only)
7. descriptive name

separated by "_". Omit any attribute that doesn't apply.

Devised by Taylor Childers May 2009