added pdf weights for systematics to nTuple
added class for reference scale factors; moved common functions to
ntuple_controller
Merge pull request #5 from bkargoll/master

Update framework
4vectors of e,mu,tau and jets can be returned rescaled; reference scale
factors now available on grid and condor/locally (see
ZtoEMu::Configure());
Merge pull request #8 from anehrkor/alex

Scale Factors and Stuff (corrected)