Updated stopword data, now from: http://members.unine.ch/jacques.savoy/clef/index.html
self is other hack to always have a correct distance function
Optimized rake algorithm for lyrics.

Following changes were made:

1) Wordlength goes into the score
2) Wordfreq is much more important than degree
3) \n splits a sentence
4) frozenset -> tuple
Changed distance/provider to match latest changes