Identify decay chains + new opt. (track selec., comb. label/pos. match, ...): added...

Identify decay chains + new opt. (track selec., comb. label/pos. match, ...): added 1) the identification of tracks reconstructed out of a decay chain, 2) possibility to combine data/MC matching by label and by cluster position, 3) more histograms and counters accordingly, 4) possibility to disable recording location of problematic tracks, 5) possibility to change the sigma-cut used to match by position, 6) possibility to select tracks using trackCuts, chi2-cut and pT-cut, 7) select dimuons on y not eta (Philippe P.)