MeasureFakeRate2 more checks on allocated histo dim
implement SusySelection::passSrWhNoMlj (used for fractions)
add flavor binning (now used several times w/ additional 2d histos)
add new 2d flavor histos
also fill histos for SRWHnoMlj; requires SusyMatrixMethod @ 31fedee
plotParametrizedFractions: initial version
move samples, fakeProcesses, getInputFiles, buildRatio to fakeUtils
buildWeightedMatrix: revert pt-dep sf (6a4e316)
rootUtils.getBinning
plotParametrizedFractions: also plot CR_SRWH1j for comparison
buildWeightedMatrix: allow parametrized fractions from plotParametrizedFractions.py

Details:
lots of changes; can run in either mode: if the '--input_fractions' argument
is specified then the fractions are retrieved from the file, otherwise
they are computed as a flat number for each selection region.
Some debug printout left that should be removed.
update to matrix Feb_27
ugly hack to test Feb_27 matrix only with CR_SRWHnoMlj; to be rolled back
produce matrix for CR_SSInc1j, which is what I am using now (Feb_27)
iterativeCorrection fix: work also when without verbose
iterativeCorrection fix: binContents->getBinContents (remnant rename)
iterCorr: plotdir also for iteration histos
iter: plotdir arg
fake: meaningful plot dir names
test ss mu+lep hf region