Channel Spectral Display

- Adds Channel Spectrum tab to display FFT of the audio output of the currently selected channel
 - Upgrades to JTransforms 3.0 FFT library
 - Adds three new context menus to main and channel spectral displays:
   -- Baseline - affects the vertical rendering baseline of the FFT
   -- Amplification - affects the vertical height of each FFT bin
   -- Averaging - affects how many FFTs are averaged to produce the display

src/controller/activity/CallEvent.java

@@ -202,6 +202,7 @@ public abstract class CallEvent
 		PAGE( "Page" ),
 		REGISTER( "Register" ),
 		REGISTER_ESN( "ESN" ),
+		REQUEST( "Request" ),
 		SDM( "SDM" ),
 		STATUS( "Status" ),
 		UNKNOWN( "Unknown" );