HackRF - final check-in. Changed all tuners to use the low-level API of the usb4java library to resolve limitation in high-level API that constrains maximum sample rate to ~2.0 MHz. Added console logging to logback.

src/source/tuner/hackrf/HackRFTuner.java

@@ -70,6 +70,11 @@ public class HackRFTuner extends Tuner
 			mLog.error( "couldn't read HackRF board id", e  );
 		}
 	}
+
+	public void dispose()
+	{
+		//TODO: dispose of something here
+	}
 	
 	public HackRFTunerController getController()
 	{