Decouple format flags from API flags
Add test for rating timestamps
Add ML-100K tests for the binary packer
Don't use event collection DAO in ML100K tests
Implement and test rating packer sorting (#538)
Remap user/item indexes correctly when sorting (#538)
Support compact ID flags in headers (#588)
Pack files with compact user/item IDs
Auto-upgrade binary packs for big IDs (#588)
Improve big data binary pack tests
Fix binary packer to work on Java <= 7
Refactor index table writer
add missing license header