fitBiasStudy.py:  added NPROCS global
fitBiasStudy.py: Now command line jobgroup number running
fitBiasStudy.py: now can merge jobGrp .pkl files
added GP's Voigt+Exp change
  (always fix exponential on same mass range in makePDFBakOld)
fitBiasStudy.py: fix small bug in finding files to merge
added etc/lxbatch_fitBias.sh & runFitBiasStudylxbatch.sh
added Anna's new bak function: ExpMOverSqP0
now have working fitBaisStudy.py scripts for lxbatch