Adding multiple transports support & other fixes:

- Avoid polling when only one input channel is used.
 - Send only handles for shared memory transport.
 - Avoid waiting in the rate logger thread when nothing to log.
 - Hide warnings from generated files
 - Fix #483

fairmq/zeromq/FairMQMessageZMQ.cxx

@@ -20,6 +20,8 @@
 
 using namespace std;
 
+static FairMQ::Transport gTransportType = FairMQ::Transport::ZMQ;
+
 string FairMQMessageZMQ::fDeviceID = string();
 
 FairMQMessageZMQ::FairMQMessageZMQ()
@@ -101,6 +103,11 @@ void FairMQMessageZMQ::SetDeviceId(const string& deviceId)
     fDeviceID = deviceId;
 }
 
+FairMQ::Transport FairMQMessageZMQ::GetType() const
+{
+    return gTransportType;
+}
+
 void FairMQMessageZMQ::Copy(const unique_ptr<FairMQMessage>& msg)
 {
     // Shares the message buffer between msg and this fMessage.