add inference_calls to MultinomialGridCRF
add inference_calls to MultinomialGridCRF

pystruct/pystruct,massmutual/pystruct,amueller/pystruct,d-mittal/pystruct,d-mittal/pystruct,pystruct/pystruct,wattlebird/pystruct,wattlebird/pystruct,amueller/pystruct,massmutual/pystruct