fix the saveTreeToFile function
Merge branch '72Xfwk' of github.com:quertenmont/2l2v_fwk into 7XYWithMiniAOD

Conflicts:
	bin/runPlotterFWLite.cc
Added taus

runExample now accesses taus and fills two simple tau-related plots.
Merge pull request #7 from vischia/runII

Run II - correct pull request