TS/TJ: addFacetField to allow only facets to be added to the document. Not sure it this is what we really need.
HM: Support for drilldownQueries
HM: Added drilldownQueries to composedquery
JJ/HM: DrilldownQuery always AND; Even for same dimension
EG: upgraded to Lucene 4.9; Refactored Java pkgs.
EG: TopDocSuperCollector DONE.
EG: refactored more Java packages;
EG: FacetSuperCollector WIP; (dreaded Java...)
EG: FacetSuperCollector WIP;
JJ/HM: First test with facets working; Very slow at the moment
JJ/HM: FacetSuperCollector multithreaded
JJ/HM: MultiSuperCollector
JJ/HM: Renamed to same as name as lucene collectors
JJ/HM: Implemented getTotalHits on topscoredocsupercollector
JJ/HM: TopFieldSuperCollector working!
JJ/HM: throw UnsupportedOperationException
JJ/HM: DedupSuperCollector
HM: Fixed indent
JJ/HM: Added start top topdocscollectors
JJ/HM: MulitThreaded lucene