[#102] v1.4.2.1 Payload Refactor. Added RegisterMetric to FB_Device Removed _Value from FB_Metric. Renamed ISparkplugDevice to IDevice
branched out to trunk example to branches/develop/mqttsparkplug/mqttsparkplug-example
[#102] changes from payloadrefactor merged into develop branch from an SVN-discconected .library
Branch of Trunk/mqttsparkplug/mqttsparkplug-unittest
branched trunk library to /branches/develop/mqttsparkplug/mqttsparkplug
created directory branches/develop/mqttsparkplug