Fix multinomial emission probabilities
Fix multinomial emission probabilities

Multinomial emission probabilities should be normalised per state.
znichols/hmmlearn,yunque/hmmlearn,fivejjs/hmmlearn,dhuppenkothen/hmmlearn,hmmlearn/hmmlearn,dhuppenkothen/hmmlearn,vchu/hmmlearn,aubreyli/hmmlearn,stringertheory/hmmlearn,stringertheory/hmmlearn,znichols/hmmlearn,aubreyli/hmmlearn,hmmlearn/hmmlearn,matthiasplappert/hmmlearn,fivejjs/hmmlearn,yunque/hmmlearn,matthiasplappert/hmmlearn,vchu/hmmlearn