Changed name of lilypond output folder to "lilypond". Huh.
moved score

Signed-off-by: parhamfh <parhamfh@kth.se>
Added exception to BeatPair.

Currently unused.

Signed-off-by: parhamfh <parhamfh@kth.se>
removed debug printing of path 

Signed-off-by: parhamfh <parhamfh@kth.se>
added static transition probability for rhythm model

Signed-off-by: parhamfh <parhamfh@kth.se>