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/nanomsg/FairMQTransportFactoryNN.h

@@ -16,6 +16,7 @@
 #define FAIRMQTRANSPORTFACTORYNN_H_
 
 #include <vector>
+#include <string>
 
 #include "FairMQTransportFactory.h"
 #include "FairMQMessageNN.h"
@@ -37,6 +38,8 @@ class FairMQTransportFactoryNN : public FairMQTransportFactory
     virtual FairMQPollerPtr CreatePoller(const std::unordered_map<std::string, std::vector<FairMQChannel>>& channelsMap, const std::vector<std::string>& channelList) const;
     virtual FairMQPollerPtr CreatePoller(const FairMQSocket& cmdSocket, const FairMQSocket& dataSocket) const;
 
+    virtual FairMQ::Transport GetType() const;
+
     virtual ~FairMQTransportFactoryNN() {};
 };