improved auto-selection of (ymin,ymax) range. If the user sets fRefIdx=-1, the ratio subplot is not filled
drawScaleFactors saves the values of the efficiencies and the scale factors as matrix(iEt,iEta)
added method editMgr
added a field FRootFileBaseDir that can be changed by a user. Added a function getTNP_etetaBinningString()
added a possibility to save scale factors to a file
a config file to access DMDY 'root_files' directory