Initial commit of redesigned internal processing and audio management.

Note: Several of the decoders are currently non-functioning in this
commit.  If you want the latest functioning codebase, please checkout
the commit prior to this one.  All decoders will eventually be updated
with this new architecture.

Currently broken:
- Logging and recording
- Aux decoders (Fleetsync/MDC/LoJack/Tait)
- LTR/Passport decoders

Changes in this commit:
- Module architecture for decoders and components with central
provisioning by the DecoderFactory
- Transition from Complex sample stream processing to float buffer
processing for improved memory management
- Redesigned filter structures - to support buffers and streams
- Resolved several memory leak issues
- Universal sharing of the thread pool manager
- Added centralized audio management with call/user prioritization and
new gui with mute/volume controls
- Embedded audio metadata for eventual streaming support
- Redesigned ProcessingChain to support independent re-use
- Added new TrafficChannelManager to handle traffic channel allocations
- Traffic Channel pool size and Call timeout available in P25 and
MPT1327 configs
- Redesigned channel and decoder gui components

src/module/decode/p25/message/tdu/lc/UnitToUnitVoiceChannelUser.java

@@ -0,0 +1,86 @@
+package module.decode.p25.message.tdu.lc;
+
+import module.decode.p25.reference.LinkControlOpcode;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class UnitToUnitVoiceChannelUser extends TDULinkControlMessage
+{
+	private final static Logger mLog = 
+			LoggerFactory.getLogger( UnitToUnitVoiceChannelUser.class );
+    /* Service Options */
+    public static final int EMERGENCY_FLAG = 92;
+    public static final int ENCRYPTED_CHANNEL_FLAG = 93;
+    public static final int DUPLEX_MODE = 94;
+    public static final int SESSION_MODE = 95;
+	public static final int[] TARGET_ADDRESS = { 112,113,114,115,116,117,118,
+		119,120,121,122,123,136,137,138,139,140,141,142,143,144,145,146,147 };
+	public static final int[] SOURCE_ADDRESS = { 160,161,162,163,164,165,166,
+		167,168,169,170,171,184,185,186,187,188,189,190,191,192,193,194,195 };
+	
+	public UnitToUnitVoiceChannelUser( TDULinkControlMessage source )
+	{
+		super( source );
+	}
+	
+    @Override
+    public String getEventType()
+    {
+        return LinkControlOpcode.UNIT_TO_UNIT_VOICE_CHANNEL_USER.getDescription();
+    }
+
+	@Override
+	public String getMessage()
+	{
+		StringBuilder sb = new StringBuilder();
+		
+		sb.append( getMessageStub() );
+		
+		if( isEmergency() )
+		{
+			sb.append( " EMERGENCY" );
+		}
+		if( isEncryptedChannel() )
+		{
+			sb.append( " ENCRYPTED CHANNEL" );
+		}
+
+		sb.append( " FROM:" + getSourceAddress() );
+		
+		sb.append( " TO:" + getTargetAddress() );
+		
+		return sb.toString();
+	}
+
+    public boolean isEmergency()
+    {
+        return mMessage.get( EMERGENCY_FLAG );
+    }
+    
+    public boolean isEncryptedChannel()
+    {
+        return mMessage.get( ENCRYPTED_CHANNEL_FLAG );
+    }
+    
+    public DuplexMode getDuplexMode()
+    {
+        return mMessage.get( DUPLEX_MODE ) ? DuplexMode.FULL : DuplexMode.HALF;
+    }
+
+    public SessionMode getSessionMode()
+    {
+        return mMessage.get( SESSION_MODE ) ? 
+                SessionMode.CIRCUIT : SessionMode.PACKET;
+    }
+    
+    public String getTargetAddress()
+    {
+    	return mMessage.getHex( TARGET_ADDRESS, 6 );
+    }
+    
+    public String getSourceAddress()
+    {
+    	return mMessage.getHex( SOURCE_ADDRESS, 6 );
+    }
+}