* 'devel' of https://github.com/arangodb/arangodb:
Fixing index markers
exclusive locks for indexes
better incremental sync
grunt build
Avoid log spam.
Removed code paths that wrote objectIds into the Agency. This did break replication.
WAL: honor tick end value
WAL fiter after collection
Reactivated client-side filtering of unnecessary markers
Added an Assert when persisting an index it's objectId is not allowed to be 0
The RestReplicationHandler now inserts new ObjectIds when replicating collections
moved files
add dependencies for TransactionManager
fix include
move engine-specific test into engine test
* 'devel' of https://github.com/arangodb/arangodb:
Removed non-applicable test case.
unused variable
rocksdb options
fixes for non-array IN lookups, added tests
Add check for distributeShardsLike to dropCollectionCoordinator.
fixed foxx test
added missing return
js request simplified if sslProtocol
pass also sslProtocol from request to internal.download
fixed issue #2450
cppcheck
Added a missing switch break.
remove dead code
updated CHANGELOG
raised to 4
added 'x-content-type-options: nosniff' to avoid MSIE bug
fixed queue size
added queue size to statistics
added queue time and request tracing with timings
* '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
...