Started to implement async stream client call
Disconnecting streaming clients in case of error
Added more Streaming data
Removed printouts
Furter streaming components implemented
Suggestions queries now have to send an AnalyticsData object storing user session ID and user-agent information
Merge branch 'feature/streaming' into develop

Conflicts:
	src/main/java/de/completionary/proxy/elasticsearch/SuggestionIndex.java
	src/test/java/de/completionary/proxy/SuggestionIndexTest.java