MAINT install Cython when running on Travis
MAINT install Cython when running on Travis

vchu/hmmlearn,emmaggie/hmmlearn,emmaggie/hmmlearn,vchu/hmmlearn,znichols/hmmlearn,mvictor212/hmmlearn,sagunb/hmmlearn,matthiasplappert/hmmlearn,hmmlearn/hmmlearn,mvictor212/hmmlearn,yunque/hmmlearn,aubreyli/hmmlearn,fivejjs/hmmlearn,aubreyli/hmmlearn,stringertheory/hmmlearn,znichols/hmmlearn,emmaggie/hmmlearn,dhuppenkothen/hmmlearn,sagunb/hmmlearn,matthiasplappert/hmmlearn,hmmlearn/hmmlearn,fivejjs/hmmlearn,dhuppenkothen/hmmlearn,yunque/hmmlearn,stringertheory/hmmlearn