Use ScoredId for item scoring
Use empty maps in immutable sparse vectors
Implement minimum neighbors for item-item
Add more logging to user-user
Allow multiple scripts for model training
Fix item/user bug in binary rating DAO streaming
Make binary helper classes nonpublic
Implement rating snapshot DAO for model inclusion
Update to support grouplens/grapht#83
Document path for rating snapshot DAO.
Add missing annotations to rating snapshot
Fix default for graph CLI output file
Improve logging
Fix graph script environment
Fix binary packing output finalization