Added ability for sub windows to get frames much more rapidly than

before. Decoupled SerialWorker from MainWindow a bit and refactored
things.

serialworker.h

@@ -40,8 +40,8 @@ public:
     void targetFrameID(int);
 
 signals: //we emit signals
-    void error(const QString &);
-    void frameUpdateTick(int, int); //update interested parties about the # of frames that have come in
+    void error(const QString &);    
+    void frameUpdateRapid(int); //sent *much* more rapidly than the above signal - one param for # of frames
     void connectionSuccess(int, int);
     void connectionFailure();
     void deviceInfo(int, int);
@@ -74,11 +74,9 @@ private:
     QSerialPort *serial;
     QSerialPortInfo *currentPort;
     CANFrameModel *canModel;
-    QTimer *ticker;
-    QTime *elapsedTime;
-    QMutex sendBulkMutex;
-    int framesPerSec;
-    int gotFrames;
+    QTimer *ticker;    
+    QMutex sendBulkMutex;        
+    int framesRapid;
     int targetID;
     STATE rx_state;
     int rx_step;