Deactivate the S->SV splitting

Deactivate the V->SS splitting

Allow QED/QCD showers of BSM particles only when BSM shower is turned on

clean up

Update 1->10 splitting

Update accept() functions in splitting functions

Update 0->01 and 1->00 splitting functions

Update overP in 0->00 splitting

Allow general BSM 1->10, 1->01, 1->11, and 0->00 splittings

Update 1/2->1/2 0 and 0->00 splittings

Update CP-even/-odd and left-/right-couplings and also complex coupling values