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/serialbusconnection.cpp

@@ -12,7 +12,7 @@
 /***********************************/
 
 SerialBusConnection::SerialBusConnection(QString portName, QString driverName) :
-    CANConnection(portName, driverName, CANCon::SERIALBUS, 1, 4000, true),
+    CANConnection(portName, driverName, CANCon::SERIALBUS,0 ,0 ,1, 4000, true),
     mTimer(this) /*NB: set connection as parent of timer to manage it from working thread */
 {
 }