Add paragraph to the corpora tutorial describing dictionary.dfs and dictionary.compactify() (#1347)
Add paragraph to the corpora tutorial describing dictionary.dfs and dictionary.compactify() (#1347)

In code snippet 13 there are two new concepts introduced that have not
been explained yet. In addition the workflow to create the dictionary
here is completely different from the workflow described in code
snippets 4 and 5. I've added a paragraph that tries to explain the new
workflow and concepts.
markroxor/gensim,macks22/gensim,robotcator/gensim,summanlp/gensim,robotcator/gensim,ELind77/gensim,markroxor/gensim,RaRe-Technologies/gensim,bhargavvader/gensim,piskvorky/gensim,RaRe-Technologies/gensim,bhargavvader/gensim,gojomo/gensim,ELind77/gensim,RaRe-Technologies/gensim,bhargavvader/gensim,gojomo/gensim,quole/gensim,summanlp/gensim,ELind77/gensim,summanlp/gensim,mattilyra/gensim,gojomo/gensim,quole/gensim,macks22/gensim,piskvorky/gensim,mattilyra/gensim,robotcator/gensim,RaRe-Technologies/gensim,gojomo/gensim,markroxor/gensim,piskvorky/gensim,macks22/gensim,quole/gensim,mattilyra/gensim