wip #34: refactored tuners to take a tuner controller as an argument.

Removed frequency change listener framework from tuner so that the tuner
controller handles all frequency change interaction.

Updated tuner view to allow selecting tuners for main spectral display
and/or launching a new spectral display by clicking in the tuner table
cell.

src/source/tuner/TunerEvent.java

@@ -29,6 +29,6 @@ public class TunerEvent
 		FREQUENCY,
 		SAMPLE_RATE,
 		REQUEST_MAIN_SPECTRAL_DISPLAY,
-		REQUEST_SECONDARY_SPECTRAL_DISPLAY;
+		REQUEST_NEW_SPECTRAL_DISPLAY;
 	}
 }