C++[NF] copy constructor and clone for nGammaPrior
C++[NF] copy constructor and clone for nGammaPrior

esc/Psignifit-3.x,esc/Psignifit-3.x,esc/Psignifit-3.x,esc/Psignifit-3.x,esc/Psignifit-3.x,esc/Psignifit-3.x