Enable new callback API

- OnData() channel data handler.
 - ConditionalRun() for devices without incoming data.
 - Header file with common main(), to be extended with getDevice/addCustomOptions.
 - Update examples (MQ/Tutorial3) to use the new API and config.
 - NewSimpleMessage() for simpler creation of small messages (additional copy).
 - Replace SetProperty/GetProperty with fConfig access.
 - Runtime configurable channel names for common devices.
 - Configurable logging interval per channel.
 - FairMQMultiplier for distributing same data to multiple outputs.
 - Cleanup state machine messages.
 - Cmd option to toggle signal handling.
 - Simpler API for send/receive timeouts.
 - Enable --log-to-file.
 - Fix coverity issues, warnings.
 - Various code cleanup and minor tweaks.

fairmq/devices/FairMQMultiplier.h

@@ -0,0 +1,34 @@
+/********************************************************************************
+ *    Copyright (C) 2014 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH    *
+ *                                                                              *
+ *              This software is distributed under the terms of the             * 
+ *         GNU Lesser General Public Licence version 3 (LGPL) version 3,        *  
+ *                  copied verbatim in the file "LICENSE"                       *
+ ********************************************************************************/
+
+#ifndef FAIRMQMULTIPLIER_H_
+#define FAIRMQMULTIPLIER_H_
+
+#include "FairMQDevice.h"
+
+#include <string>
+
+class FairMQMultiplier : public FairMQDevice
+{
+  public:
+    FairMQMultiplier();
+    virtual ~FairMQMultiplier();
+
+  protected:
+    int fMultipart;
+    int fNumOutputs;
+    std::string fInChannelName;
+    std::vector<std::string> fOutChannelNames;
+
+    virtual void InitTask();
+
+    bool HandleSingleData(std::unique_ptr<FairMQMessage>&, int);
+    bool HandleMultipartData(FairMQParts&, int);
+};
+
+#endif /* FAIRMQMULTIPLIER_H_ */