remove unused outputfile
create TMs of different sizes (not yet tested)
fix order of arguments when calling increasing_data/7
fix combine_int_dicts: return a defaultdict(int). print time to extract phrases. store extracted phrases before combining them
save phrase_to_internals to file
change docstring
add prefix to the filename instead to the path
fix typo in alignments temp filename
check if key is in defaultdict: getting an item from a defaultdict will add it if it is not yet present. explicitly write the initial values in cumulative_freqs to prevent passing references between the objects
plot BLEU scores for different portions of the train data