option --mctype fully implemented

it fills an integer variable:

--mctype 0  (selects real data)
--mctype 1  (selects W+ MC)
--mctype 2  (selects W- MC)
--mctype 3  (selects any MC other than those above)
now we use the variable McType set by the option --mctype to open the An prediction files for
W+ MC (option --mctype 1) ot W- MC (option --mctype 2)
the variable IsMc is now set using the option --mctype and no longer the optio -m

+   //bool    isMC                = anaOptions.IsMc(); // s.f. 21 Jan 2014
+   int     isMC                = anaOptions.McType(); // s.f. 21 Jan 2014