Bu2JpsiKpipi Analysis Production

Added analysis production for Bu2JpsiKpipi. This is for

1. Amplitude analysis of Bu2 Jpsi K pi pi decays.
2. Helicity formalism fit to X(3872)->Jpsi pi pi, with Bu->X(3872) K decays. X(3872) helicity couplings will then be ported to Bd -> X(3872) K pi amplitude analysis.