- Updated N-gram counts and document frequencies (for lexical and syntactic TF-IDF scores)
- distinctness module now has methods to compare distinctness scores for memorable and non-memorable data to extract general stats
- also added a method to compute the combined TF-IDF (1-gram + 2-gram + 3-gram) score
 - ngram_stats.txt has extracted stats
- Added relative path compatibility so that script can be called from other locations and the right path is accessed
- Removed a stray todo
- Added the whole sentence as a param to add_extra_features function, since emotion strength and TF-IDF scores need the whole sentence without preprocessing
- added features for lexical distinctness