compute_fake_compositions: write out normalized comp histos
compute_eff

don't plot Higgs
Verified that what we get from the nutples is close to what we got
from the histos.  Small remaining differences wrt. histos to be sorted
out (later on).
add pt_eta composition histos

The number of weighted entries is not exactly the same for the pt,
eta, and pt_eta histos. Shifting the under/overflows doesn't seem
to fix this...small effect, should be investigated further.
rootUtils.fetchObjectsFromFile warn when missing obj
just rename arg
initial version, working, missing sf
buildWeightedMatrix: reuse binning from fakeUtils
apply scale factors
add corrected etCone,ptCone to fake tuples