Useful scripts for validating pu Jet Id

The actual plots can be found in: http://www.hephy.at/user/jbrandstetter/PUId_validation/

The naming might be a bit confusing: newPUId is the first version of the new trained PUId. newPUId_1610 is the second version of the new trained PUId with different eta binned weights. newBinning_vs_oldBinning compares the first and second version.