* Testing hash for documents
* fixing logspam error
* added base support for kHash in the edge index
* Current version of hash enabled edge index
* removed rocksdb key type byte, dynamic prefixes for hash-index
* Fixing issues with key classes
* Fixing merge conflict
* Fixing version with semi-working hash index
* fixing various issues
* Fixing hanger in EdgeIndexIterator nextExta, when _cache is disabled. Reenable cache
* Fixing geo index bounds, and fillIndexes error handling
* Adding back failure point
* Fixing RocksDBKey::vertexId
* Added version check on startup
* Fixing version check
* added one more check
* properly detect column families at startup
* Adding additional sanity checking
* Adding missing column family
* some fixes
* Turned off geoindex sync
* fixed error
* added asserts (untested)
* Adding more asserts
* 'engine-api' of https://github.com/arangodb/arangodb:
slightly adjust error messages
Fixing jslint errors
Add changelog from 3.1
Properly generate an error message during import
Fixed scannedIndex values in traverser tests. It did not report the correct number of lookups required after modification for new Storage-Engine
fixed issue #2429
issue #2427: change while into an if
don't fail when non-array, but simply ignore it
* 'engine-api' of https://github.com/arangodb/arangodb: (46 commits)
Merged RocksDBPathBasedIndex into RocksDBVPackIndex.
fix handling of externals
fix toArray()
fix returning documents
Added hash-, skip list, persistent indexes
harmonize filtering - filter on full filename.
mini modifications
standardize starting of servers for replication tests
Edge index compliant with design doc
another fix for #2404
Moved „removeLargeRange“ method to commons
Added length byte to IndexValue keys.
fixed issue #2404
Added drop to primary index
Added drop() to indexes
Fixes a coordinator crash in Clustered Traversal. In case of failover during query planning.
Fixed edge index
Expand on CORS documentation
Let ArangoDB handle the allow-credentials header
make the authentication tests run on directories
...