A partial commit that changes CANFrame over to be based on

QCanBusFrame so that things are more compatible with other Qt based
CAN bus code. Not complete yet but getting there.

bus_protocols/isotp_handler.h

@@ -1,5 +1,4 @@
-#ifndef ISOTP_HANDLER_H
-#define ISOTP_HANDLER_H
+#pragma once
 
 #include <Qt>
 #include <QObject>
@@ -53,5 +52,3 @@ private:
     void processFrame(const CANFrame &frame);
     void checkNeedFlush(uint64_t ID);
 };
-
-#endif // ISOTP_HANDLER_H