first fitInvestigations
trying to understand things
put rooDebugFR and rooDebugChi2 in helpers.py

  and added them and a debug log to fitBiasStudy.py
added singleUseScripts/fitInvestigations2.py (S+B Fits)
RMP: more captions, proper chi2; Added fitInv3
now print correlation matrix when debugFR
added singleUseScripts/fitInvestigationsEnsemble.py
Merge branch 'master' into fitChecks

  update with fixing of Bernstein param
  and bkg comparison plots