Determine hardware threshold in Nuclearizer App

[ckierans]

@fhagemann needs the hardware threshold in ADC for each strip in the DEE, and we should determine this in the Nuclearizer StripEnergyThresholdFinder App that @JarredMRoberts is currently working on (PR #166).

See below for an example fit from Felix in the CDEE slides from August 11th:

[fhagemann]

Closed by #208