Fixed up ability to send frames while not connected and to show frames

that were sent within the same window as received frames. Added a new
scripting window that can be used to create scripts that send and
receive messages at runtime - not done but sort of working.

canframemodel.h

@@ -23,7 +23,7 @@ public:
     int columnCount(const QModelIndex &) const;
     int totalFrameCount();
 
-    void addFrame(CANFrame &, bool);
+    void addFrame(const CANFrame &, bool);
     void sendRefresh();
     void sendRefresh(int);
     void sendBulkRefresh(int);