Adds preliminary support for legacy P25 CAI VSELP voice frames. VSELP 1

and 2 messages simply capture the message at this point -- don't yet
know the format for the voice frames and embedded signalling.

src/module/decode/p25/message/vselp/VSELP2Message.java

@@ -0,0 +1,42 @@
+package module.decode.p25.message.vselp;
+
+import alias.AliasList;
+import bits.BinaryMessage;
+import module.decode.p25.message.P25Message;
+import module.decode.p25.reference.DataUnitID;
+
+public class VSELP2Message extends P25Message
+{
+	/**
+	 * Motorola VSELP audio message 1.
+	 * 
+	 * @param message
+	 * @param duid
+	 * @param aliasList
+	 */
+	public VSELP2Message( BinaryMessage message, DataUnitID duid, AliasList aliasList )
+	{
+		super( message, duid, aliasList );
+	}
+	
+	@Override
+	public String getMessage()
+	{
+		StringBuilder sb = new StringBuilder();
+		
+		sb.append( getMessageStub() );
+		sb.append( " " );
+		sb.append( mMessage.toString() );
+		
+		return sb.toString();
+	}
+	
+    public String getMessageStub()
+    {
+		StringBuilder sb = new StringBuilder();
+
+		sb.append( "VSELP 2 VOICE FRAME" );
+
+	    return sb.toString();
+    }
+}