* fixed issue #3075
* update the known issues document, as some issues have already been fixed
* speed up equality lookups in unique vpack indexes
* Allow for re-use of RocksDBKey objects through transaction leaser.
* Converted all RocksDBKey variants to non-static constructors.
* Added virtual attributes for enterprise on Methods.cpp
* Working no access collections
* align a comment
* Documentation and test fix
* fixing community build
* cleaning up several duplicate versions of Index::memory, Index::cleanup, Index::drop, integrating branch issue-383-ensure-delete
* fixing wrong column family
* 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