Add a new connection type - Lawicel. It works for some devices, not

all. More development needed but this is a start. Also added ability
to set serial speed and bus speed in the device setup which may be
useful for other connection devices too.

connections/canconconst.h

@@ -20,6 +20,7 @@ namespace CANCon {
         REMOTE,
         KAYAK,
         MQTT,
+        LAWICEL,
         NONE
     };
 }