LiveData: Initial implementation

Add support for live data subscription via Device::subscribeLiveData() and
Device::unsubscribeLiveData(). The live data API can be used to subscribe to
individual "signals", a full list of which can be found in LiveDataValueType.

include/icsneo/communication/packet/livedatapacket.h

@@ -0,0 +1,27 @@
+#ifndef __LIVEDATAPACKET_H__
+#define __LIVEDATAPACKET_H__
+
+#ifdef __cplusplus
+
+#include <cstdint>
+#include <memory>
+#include <vector>
+#include "icsneo/api/eventmanager.h"
+#include "icsneo/communication/message/message.h"
+#include "icsneo/communication/message/livedatamessage.h"
+#include "icsneo/communication/livedata.h"
+
+namespace icsneo {
+
+class LiveDataMessage;
+
+struct HardwareLiveDataPacket {
+	static std::shared_ptr<Message> DecodeToMessage(const std::vector<uint8_t>& bytes, const device_eventhandler_t& report);
+	static bool EncodeFromMessage(LiveDataMessage& message, std::vector<uint8_t>& bytes, const device_eventhandler_t& report);
+};
+
+}
+
+#endif // __cplusplus
+
+#endif // __LIVEDATAPACKET_H__