Add shared memory example

- Add shared memory example in examples/MQ/SharedMemory
 - Device/Task termination: try soft first, and abort if it fails
 - Interactive mode: prevent cin from blocking forever (poll)

fairmq/zeromq/FairMQPollerZMQ.h

@@ -19,6 +19,8 @@
 #include <unordered_map>
 #include <initializer_list>
 
+#include <zmq.h>
+
 #include "FairMQPoller.h"
 #include "FairMQChannel.h"
 #include "FairMQTransportFactoryZMQ.h"