2i: Improvements in paginated iteration
2i: Improvements in pagination
2i: Clean logs
Added the new option 'use_hc' (use high-compression) to compression parameters (actually only used in LZ4Compressor)
Upgrade to Lucene 4.8.1
2i: Added SortingMergePolicy
2i: Minor refactoring
2i: Improvements in query/filter construction.
2i: Added index compaction to keyspace compaction job
2i: Refactoring in compaction/optimize
2i: Improve index compaction/merge
Merge branch 'release/2.0.82'