Updated P25 channel display to show relevant site information.

Changed Site ID Alias to a string from integer to support P25 style site identifiers (RFSS-Site)

src/decode/p25/message/P25Message.java

@@ -75,7 +75,7 @@ public class P25Message extends Message
 	@Override
     public String getEventType()
     {
-	    return "P25 " + mDUID.name();
+	    return mDUID.name();
     }
 
 	@Override

src/decode/p25/message/tdu/TDUMessage.java

@@ -0,0 +1,15 @@
+package decode.p25.message.tdu;
+
+import alias.AliasList;
+import bits.BitSetBuffer;
+import decode.p25.message.P25Message;
+import decode.p25.reference.DataUnitID;
+
+public class TDUMessage extends P25Message
+{
+	public TDUMessage( BitSetBuffer message, DataUnitID duid,
+            AliasList aliasList )
+    {
+	    super( message, duid, aliasList );
+    }
+}