Several FairMQ fixes and improvements:

- FairMQ: add possibility to poll on multiple channels.
- FairMQ: include command channel when polling on blocking calls (for unblocking without termination).
- FairMQ: move signal handler inside of FairMQDevice class (call FairMQDevice::CatchSignals() in the main function).
- FairMQ: add 'bool CheckCurrentState(statename)' (instead of 'GetCurrentState() == statename' that cannot be thread safe).
- FairMQDevice: add 'InteractiveStateLoop()' method that can be used to change states from the command line.
- FairMQDevice: add automatic transition to IDLE state if Run() exits without an external event.
- FairMQDevice: implement device reset.
- FairMQDevice: use unordered_map for device channels.
- FairMQChannel: improve address validation for channels.
- FairMQChannel: add ExpectsAnotherPart() method to check if another msg part is expected (old approach still works).
- FairMQ: remove invalid transition from the run files.
- FairMQFileSink: disable ROOT termination signal handler.
- Tutorial3: spawn xterm windows from start scripts without overlapping for better visibility.
- FairMQ Examples: update protobuf test and move its files to a common directory.
- FairMQStateMachine: improve feedback on invalid transitions (more readable).

fairmq/nanomsg/FairMQTransportFactoryNN.h

@@ -30,8 +30,12 @@ class FairMQTransportFactoryNN : public FairMQTransportFactory
     virtual FairMQMessage* CreateMessage();
     virtual FairMQMessage* CreateMessage(size_t size);
     virtual FairMQMessage* CreateMessage(void* data, size_t size, fairmq_free_fn *ffn = NULL, void* hint = NULL);
+
     virtual FairMQSocket* CreateSocket(const std::string& type, const std::string& name, int numIoThreads);
+
     virtual FairMQPoller* CreatePoller(const std::vector<FairMQChannel>& channels);
+    virtual FairMQPoller* CreatePoller(std::map< std::string,std::vector<FairMQChannel> >& channelsMap, std::initializer_list<std::string> channelList);
+    virtual FairMQPoller* CreatePoller(FairMQSocket& dataSocket, FairMQSocket& cmdSocket);
 
     virtual ~FairMQTransportFactoryNN() {};
 };