Add a date+time time-stamp to each snark message.

http://git.idk.i2p/I2P_Developers/i2p.i2p/issues/515

apps/i2psnark/java/src/org/klomp/snark/SnarkManager.java

@@ -496,6 +496,7 @@ public class SnarkManager implements CompleteListener, ClientApp, DisconnectList
      * @since 0.9.14.1
      */
     public void addMessageNoEscape(String message) {
+       message = DataHelper.formatTime(System.currentTimeMillis()) + " " + message;
         _messages.addMessageNoEscape(message);
         if (_log.shouldLog(Log.INFO))
             _log.info("MSG: " + message);