Create LambdaB_Psi2SLambda_ppi.dec

Add BPH decay file
Update LambdaB_Psi2SLambda_ppi.dec

Update the BPH decay file
Merge pull request #2539 from heppye/CMSSW_5_3_X

Create LambdaB_Psi2SLambda_ppi.dec