Attributes to include in histogram names in order of usage:

1. cpm/cmm/jem/ppm/rod

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

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

   Devised by Taylor Childers May 2009