Renamed label access functions in KTAxisProperties.
Added a DataLabel to KTPhysicalArray.
Added KTPowerSpectrumData and updated KTPowerSpectrum, including the ability to make PSDs.
Moved MakePowerHistogram and MakePowerDistributionHistogram functions to KT2ROOT.
Missing from the last commit
Added scaling to KTFrequencySpectrum and KTTimeSeriesDist.
Added KTConvertToPower
Modified KTDataAccumulator to calculate a simple average over all slices. Added KTPowerSpectrumData interfaces.
Added KTPowerSpectrumData drawing
Added KTPowerSpectrumData interfaces to KTGainVariationProcessor
Added the ability to discriminate KTPowerSpectrumData.
Added the ability to store KTGainVariationData and use it for all inputs.