Fixed HdpModel.print_topics and added HdpModel.show_topics
Fixed HdpModel.print_topics and added HdpModel.show_topics

Fixes #189. HdpModel.show_topics and HdpModel.print_topics now have the same functionality as LdaModel.show_topics and LdaModel.print_topics.

Kreiswolke/gensim,RaRe-Technologies/gensim,dsquareindia/gensim,loisaidasam/gensim,ELind77/gensim,akutuzov/gensim,macks22/gensim,bhargavvader/gensim,piskvorky/gensim,RaRe-Technologies/gensim,Kreiswolke/gensim,bhargavvader/gensim,pombredanne/gensim,mattilyra/gensim,laic/gensim,dsquareindia/gensim,zachmayer/gensim,loisaidasam/gensim,gojomo/gensim,olavurmortensen/gensim,quole/gensim,jaksmid/gensim,robotcator/gensim,piskvorky/gensim,olavurmortensen/gensim,ELind77/gensim,davechallis/gensim,summanlp/gensim,manasRK/gensim,markroxor/gensim,zachmayer/gensim,Kreiswolke/gensim,ziky90/gensim,ziky90/gensim,davechallis/gensim,markroxor/gensim,akutuzov/gensim,manasRK/gensim,jaksmid/gensim,bhargavvader/gensim,summanlp/gensim,markroxor/gensim,akutuzov/gensim,mattilyra/gensim,laic/gensim,quole/gensim,ziky90/gensim,gojomo/gensim,davechallis/gensim,RaRe-Technologies/gensim,loisaidasam/gensim,pombredanne/gensim,zachmayer/gensim,ELind77/gensim,isohyt/gensim,manasRK/gensim,macks22/gensim,isohyt/gensim,jaksmid/gensim,tzoiker/gensim,gojomo/gensim,mattilyra/gensim,quole/gensim,laic/gensim,dsquareindia/gensim,piskvorky/gensim,tzoiker/gensim,olavurmortensen/gensim,robotcator/gensim,macks22/gensim,pombredanne/gensim,tzoiker/gensim,isohyt/gensim,robotcator/gensim,summanlp/gensim,RaRe-Technologies/gensim,gojomo/gensim