updated closure to the other flavors. propagated to closure.py
cosmetics
nothing done
error calculation and some sort of propagation
also added helper.py agian, because i like the name
OS functionality
added errors, or at least something of the sort
Merge branch 'closure' of ssh://github.com/ETHZ/FakeLeptonFW into closure
final, synched dilepton selection, improvements on the closure test
Merge branch 'closure'

Conflicts:
	include/FWBaseClass.h