STORM-583 Add Microsoft Azure Event Hub spout implementations

STORM-713 Include topic information with Kafka metrics.

STORM-708 CORS support for STORM UI.

STORM-741 Allow users to pass a config value to perform impersonation.

STORM-724 Document RedisStoreBolt and RedisLookupBolt which is missed.

STORM-711 All connectors should use collector.reportError and tuple anchoring.

STORM-714 Make CSS more consistent with self, prev release

STORM-703 With hash key option for RedisMapState, only get values for keys in batch

STORM-691 Add basic lookup / persist bolts

STORM-727 Storm tests should succeed even if a storm process is running locally.

STORM-166 Highly Available Nimbus