removed Alex's old version of standardSugra.
added mS as an optional variable to standardsemiSugra
for use in the Z3 violating case. So although SemiMsugraBcs was designed
for use in Z3 case it can now be used in Z3 violating model too.
Merge branch 'nmssm2' of https://github.com/Expander/softsusy into nmssm2