update bigrams, deleted several entries
Added option to create_dic to choose if we want to delete stopwords or not. Other arguments like choose how many emails we want to include are now available
Added option to create_dic to choose if we want to delete stopwords or not. Other arguments like choose how many emails we want to include are now available
Added option to remove stopwords only if wanted
Added an option to customize the dictionary if wanted
Trying to merge
Merge pull request #35 from elenagr/master

Remove stopwords is now optional in stemming.py and create_dic.py