Z-Fact0r middleware platform and components

Summary
Definition of the specifications for the middleware and related components that integrates the sensors network with the proposed Z-Fact0r architecture. The middleware itself will act as service bus, based on SOA architecture, for the communication between levels. In this sense, all the elements to be attached to the middleware will be considered. The integration of the middleware with the multi sensor/actuator cloud will be achieved through the Device Managers which will allow an interoperable communication mechanism based on standardized protocols (e.g. OPC UA) with any kind of sensors and actuators on the shop floor.