removed commented code and added a generic copy_files method into BaseExport to copy the generated files to matlab folder
function signature modified to become a generic function
added adv_verb bigrams
added a function that processes adv/verb bigrams
modified fuction turned to a generic one
code refactoring and added a creation of files that writes matrix files sizes
list of tags moved to util module to turn them reusable; created the function that extracts trigrams beginning with adverbs and ends with adjective
requirements updated due to iPython
module refactoring and creation of a method that extracts all ngrams from a given doc
some functions was refactored and ngrams_polarities and trigram_polarity was created
refactoring