Cut Based Identification for Muon and Electron

Hi Loic,

I have implemented the Id cut for the cut based analysis.
Some comments:

For the electrons there are more working points (Veto, Loose, Medium, Tight);
I used tight cuts to fix passId as true, and loose cuts to fix passLooseParticle tag to true. All the working points are implemented inside the code and two new boolean tags are introduced:  passVetoElectron and passSoftElectron.

I have changed: reco::VertexCollection vtx -> reco::Vertex vtx, because It is no more available in CMSSW_7_0_8.
Due to this, I commented out two histograms at line 1244 ("ntvxraw") and 1245  ("ntvx").

Now I will work to implement MVA cuts.

Alessio