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/FairMQTransportFactory.h

@@ -23,6 +23,8 @@
 #include "FairMQPoller.h"
 #include "FairMQLogger.h"
 
+class FairMQChannel;
+
 class FairMQTransportFactory
 {
   public:
@@ -31,6 +33,8 @@ class FairMQTransportFactory
     virtual FairMQMessage* CreateMessage(void* data, size_t size, fairmq_free_fn *ffn = NULL, void* hint = NULL) = 0;
     virtual FairMQSocket* CreateSocket(const std::string& type, const std::string& name, int numIoThreads) = 0;
     virtual FairMQPoller* CreatePoller(const std::vector<FairMQChannel>& channels) = 0;
+    virtual FairMQPoller* CreatePoller(std::map< std::string,std::vector<FairMQChannel> >& channelsMap, std::initializer_list<std::string> channelList) = 0;
+    virtual FairMQPoller* CreatePoller(FairMQSocket& dataSocket, FairMQSocket& cmdSocket) = 0;
 
     virtual ~FairMQTransportFactory() {};
 };