Release 3.3.0

• Websockets: client and device endpoints combined
• Websockets: User API implemented
• Websockets: Network API implemented
• Websockets: get/list command/notification implemented
• Websockets: Delete device implemented
• Websockets: JsonStringWrapper data field should be JSON
• Kafka topics creation on startup added
• Dockerfile container for devicehive-hazelcast added
• Hazelcast portable factory implemented
• Disruptor configuration improvements
• Kafka configuration improvements
• Logging configuration improvements
• Performance improvements
• Jenkins CI setup
• Swagger configuration fixes
• Bug fixing