GIRAPH-532: Give an explanation when trying to use unregistered aggregators (majakabiljo)
GIRAPH-530: GiraphInputFormat#getSplits() should be aware of multithreaded input (apresta)
GIRAPH-539: When having open requests log which workers are they sent to (majakabiljo)
GIRAPH-535: Range-partitioning and edge locality benchmark (apresta)
Add missing files from GIRAPH-535
GIRAPH-541: Log before observers (nitay)
GIRAPH-542: Progress calls in aggregate (majakabiljo)
GIRAPH-545: Improve Facebook Hadoop dependency (nitay)
GIRAPH-553: Cleanup HCatalogVertexOutputFormat (majakabiljo)
GIRAPH-528: Decouple vertex implementation from edge storage (apresta)
Add back type hint for getAggregatedValue() in Vertex.
GIRAPH-556: Race condition in EdgeStore (apresta)
GIRAPH-523: MasterObserver should pass in superstep number (gaurav.menghani via nitay)
GIRAPH-550: HiveVertexReader should call initialize, not users (nitay).
GIRAPH-550: HiveVertexReader should call initialize, not users (nitay)
GIRAPH-559: Giraph build breaks (nitay)
GIRAPH-554: Set PartitionContext in InternalVertexRunner (majakabiljo)
Fix mistake in GIRAPH-554
GIRAPH-561: Only print vertex/edge input classes if not null (aching)
GIRAPH-562: Implement getConf/setConf in AbstractHive classes (majakabiljo)