Added polish stemmer to export file
Expand the list of nouns for the Japanese inflector
Polish language handlers
Fixing problem when deriving tfidf for the term 'constructor' #119
singular verbs like 'flies' or 'tries' were inflected to 'flie' and 'trie' instead of 'fly','try'
support for tornadoes, ephemerides and cortices nouns
allowing for 0 parameter in levenshtein distance
short verbs like 'is', 'are' or 'has' got stemmed in the form of 'i', 'ar' and 'ha' which is incorrect. added condition to exclude verbs of 3 characters or less from stemming