Message: Create a type system so non-frame data can be represented

This change breaks existing code, hence the version bump, but it's
going to be much less error prone going forward.

include/icsneo/communication/message/flexray/flexraymessage.h

@@ -10,7 +10,7 @@
 
 namespace icsneo {
 
-class FlexRayMessage : public Message {
+class FlexRayMessage : public Frame {
 public:
 	uint16_t slotid = 0;
 	double tsslen = 0;