Pull request for the soft muon analysis

1) I updated the W Normalization uncertainties.

2) We plan to correlate tau efficiency with the standard categories : 
=> eff_t_mutau instead of eff_t_mutau_soft

3) L1Etm shape unc should not be applied to QCD
=> signal,ZTT,ZL,ZJ,TT,VV,W instead of background,signal