#39 WIP - initial efforts to restructure the way tuners and tuner

controllers manager sample buffer processing and channel management.
General cleanup across all modules to remove the executor from each
of the start() methods.  Removed the B100 tuner class since it's not
yet implemented.

src/source/tuner/hackrf/HackRFTunerController.java

@@ -69,6 +69,7 @@ import source.SourceException;
 import source.tuner.TunerController;
 import source.tuner.configuration.TunerConfiguration;
 import source.tuner.usb.USBTransferProcessor;
+import source.tuner.usb.USBTunerController;
 
 import javax.usb.UsbException;
 import java.nio.ByteBuffer;
@@ -76,7 +77,7 @@ import java.nio.ByteOrder;
 import java.util.Arrays;
 import java.util.concurrent.LinkedTransferQueue;
 
-public class HackRFTunerController extends TunerController
+public class HackRFTunerController extends USBTunerController
 {
     private final static Logger mLog = LoggerFactory.getLogger(HackRFTunerController.class);
 
@@ -160,6 +161,12 @@ public class HackRFTunerController extends TunerController
         mUSBTransferProcessor = new USBTransferProcessor(name, mDeviceHandle, mSampleAdapter, USB_TRANSFER_BUFFER_SIZE);
     }
 
+    @Override
+    protected USBTransferProcessor getUSBTransferProcessor()
+    {
+        return mUSBTransferProcessor;
+    }
+
     /**
      * Claims the USB interface.  If another application currently has
      * the interface claimed, the USB_FORCE_CLAIM_INTERFACE setting
@@ -874,23 +881,4 @@ public class HackRFTunerController extends TunerController
             return sb.toString();
         }
     }
-
-    /**
-     * Adds a sample listener.  If the buffer processing thread is
-     * not currently running, starts it running in a new thread.
-     */
-    public void addListener(Listener<ComplexBuffer> listener)
-    {
-        mUSBTransferProcessor.addListener(listener);
-    }
-
-    /**
-     * Removes the sample listener.  If this is the last registered listener,
-     * shuts down the buffer processing thread.
-     */
-    public void removeListener(Listener<ComplexBuffer> listener)
-    {
-        mUSBTransferProcessor.removeListener(listener);
-    }
-
 }