Add comment explaining lack of multistream support (#1515)
Add comment explaining lack of multistream support (#1515)

* Add comment explaining lack of multistream support

See #1496, looks like this has confused some people. -POLM

* Add file patterns to documentation

gojomo/gensim,gojomo/gensim,mattilyra/gensim,markroxor/gensim,RaRe-Technologies/gensim,markroxor/gensim,RaRe-Technologies/gensim,macks22/gensim,mattilyra/gensim,gojomo/gensim,macks22/gensim,markroxor/gensim,macks22/gensim,RaRe-Technologies/gensim,RaRe-Technologies/gensim,piskvorky/gensim,piskvorky/gensim,piskvorky/gensim,mattilyra/gensim,gojomo/gensim