Implemented MessagingModule and CassandraReplicator worker (consumer).
Added basic enable/disable mechanism for messaging workers.
Fixed activemq dependency.
Moved MessagingModule to AtlasProcessingWebApplicationContext.
queue update events on content write
name template destination
Polishing messaging code.
Improved EventQueueingContentWriter by using a shared json mapper and fixed message serialization by using text messages (as required by the consumer side).
Specifying injection of "changes producer" by name, in order to avoid clashes.
mongo-back recent change queue consumer
add datetime field to events
Refactored recent changes logger implementation.
Moved RecentChangesStore outside here and inside atlas-persistence.
Moved org.atlasapi.persistence.messaging.* stuff into org.atlasapi.messaging.* (bad previous refactoring probably).
Implemented first version of ElasticSearch-based Item indexing as of MBST-2218.
Added ES index init.
Renamed Event to Message.
Fixed lucene dep.
Fixed stage.properties.
Fixed Spring dependencies.