Add (optional) Google Protocol Buffers support (example in Tutorial 3).

To use protobuf, run cmake as follows:
cmake -DUSE_PROTOBUF=1 ..
For this, protobuf library has to be installed on the system.

Further changes:
Clean up splitter/merger: default are N-to-1-merger and 1-to-N-splitter.
Fix bug in nanomsg message deallocation.
Setup proper buffer sizes for nanomsg/zeromq via cmake/bash script.
chmod +x for start scripts.

fairmq/prototest/FairMQBinSink.cxx

@@ -0,0 +1,46 @@
+/**
+ * FairMQBinSink.cxx
+ *
+ * @since 2013-01-09
+ * @author D. Klein, A. Rybalchenko
+ */
+
+#include <boost/thread.hpp>
+#include <boost/bind.hpp>
+
+#include "FairMQBinSink.h"
+#include "FairMQLogger.h"
+
+FairMQBinSink::FairMQBinSink()
+{
+}
+
+void FairMQBinSink::Run()
+{
+  LOG(INFO) << ">>>>>>> Run <<<<<<<";
+
+  boost::thread rateLogger(boost::bind(&FairMQDevice::LogSocketRates, this));
+
+  while ( fState == RUNNING ) {
+    FairMQMessage* msg = fTransportFactory->CreateMessage();
+
+    fPayloadInputs->at(0)->Receive(msg);
+
+    int inputSize = msg->GetSize();
+    int numInput = inputSize / sizeof(Content);
+    Content* input = reinterpret_cast<Content*>(msg->GetData());
+
+    // for (int i = 0; i < numInput; ++i) {
+    //     LOG(INFO) << (&input[i])->x << " " << (&input[i])->y << " " << (&input[i])->z << " " << (&input[i])->a << " " << (&input[i])->b;
+    // }
+
+    delete msg;
+  }
+
+  rateLogger.interrupt();
+  rateLogger.join();
+}
+
+FairMQBinSink::~FairMQBinSink()
+{
+}