created classes for the different papers in this research
pre_processing module refactoring
refactor of classification module and its tests for the change of type of data between stages
refactoring of stopwords removal and calling that function before POS and ngrams
creation of the class that holds method to the Pimpalkar paper; changes in evaluation module to fits with the new class and example file
quick refactoring
organization of examples files
bug fix in pimpalkar classification
inserted a code that build a new stopwords list (from Standford, NLTK and Pattern); refactoring of code involved in this change, as well as tests
organization of results files
stopwords files from pattern lib