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.

examples/MQ/2-sampler-processor-sink/FairMQExample2Processor.h

@@ -5,37 +5,20 @@
  *         GNU Lesser General Public Licence version 3 (LGPL) version 3,        *  
  *                  copied verbatim in the file "LICENSE"                       *
  ********************************************************************************/
-/**
- * FairMQExample2Processor.h
- *
- * @since 2014-10-10
- * @author A. Rybalchenko
- */
 
 #ifndef FAIRMQEXAMPLE2PROCESSOR_H_
 #define FAIRMQEXAMPLE2PROCESSOR_H_
 
-#include <string>
-
 #include "FairMQDevice.h"
 
 class FairMQExample2Processor : public FairMQDevice
 {
   public:
-    enum
-    {
-        Text = FairMQDevice::Last,
-        Last
-    };
     FairMQExample2Processor();
     virtual ~FairMQExample2Processor();
 
-    static void CustomCleanup(void* data, void* hint);
-
   protected:
-    std::string fText;
-
-    virtual void Run();
+    bool HandleData(FairMQMessagePtr&, int);
 };
 
 #endif /* FAIRMQEXAMPLE2PROCESSOR_H_ */