Added some Bd files containing HNL decays

See merge request !483

(cherry picked from commit fdfd2cc6)

80a3d6c0 Added some Bd files containing HNL decays
9d332445 Update Bd_MuXMajoranaNeutrino2MuX,m=3000MeV,t=1000ps,CC,DecProdCut.dec
abc32120 Update Bd_MuXMajoranaNeutrino2MuX,m=3000MeV,t=100ps,CC,DecProdCut.dec
b51f33aa Update Bd_MuXMajoranaNeutrino2MuX,m=3000MeV,t=10ps,CC,DecProdCut.dec
9dad9ed6 Correcting removed by mistake `# from Gauss.Configuration import *'
e9c36709 Correcting removed by mistake `# from Gauss.Configuration import *'
47108873 Correcting removed by mistake `# from Gauss.Configuration import *'