* issue 511.5: remove cid from IResearchPrimaryKey since iresearch data-stores are per-collction, minr code cleanup
* get rid of CID field in a document
* make ArangoSearch PK encoding/decoding logic explicit
* refactor arangosearch pks
* minor refactoring
* store PK as BigEndian since it leads to more compact index representation
* force iresearch to not to use libbfd
* fix tests
* issue 496.3: move more coordinator-related logic out of TRI_vocbase_t, rename some arangosearch view configuration parameters, remove some consolidation policies, update iresearch to revision 6fd9760d81b136f769e277ea5b8f53996ed7a1ca
* address potential deadlock between link creation and FlushThread
* remove code causing nullptr access
* add back lock around reader reopen
* revert: address potential deadlock between link creation and FlushThread
* invalidate payload for each field in FieldIterator before setting a value
* extend filter checking
* extend IResearchViewNode tests
* distinguish scorer and filter arangosearch functions
* initial implementation
* add some tests for the recently added aql functions
* more tests
* force phrase function to use context-wise analyzer
* more tests
* ensure exists function uses analyzer from context
* fix query execution tests
* allow to override context analyzer in phrase function
* modify EXISTS signature to accept optional analyzer, fix tests
* more tests
* even moar tests
* more tests
* update documentation
* add testing scorer
* fixes after review
* attempt to fix msvc compilation issues
* add extra check
* add another check
Jan Christoph Uhde
Vasiliy
Dan Larkin-York
Andrey Abramov
Frank Celler
Jan