Update FairMQStateMachine & introduce FairMQChannels

Organize sockets as a map of vectors of FairMQChannels.

Update FairMQStateMachine by removing SETTINGINPUT, SETTINGOUTPUT,
BIND and CONNECT states and by adding INITIALIZING_TASK, RESETTING_TASK
and RESETTING_DEVICE states. Run states functions in their own thread.

fairmq/FairMQChannel.h

@@ -0,0 +1,52 @@
+/********************************************************************************
+ *    Copyright (C) 2014 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH    *
+ *                                                                              *
+ *              This software is distributed under the terms of the             *
+ *         GNU Lesser General Public Licence version 3 (LGPL) version 3,        *
+ *                  copied verbatim in the file "LICENSE"                       *
+ ********************************************************************************/
+/**
+ * FairMQChannel.h
+ *
+ * @since 2015-06-02
+ * @author A. Rybalchenko
+ */
+
+#ifndef FAIRMQCHANNEL_H_
+#define FAIRMQCHANNEL_H_
+
+#include <string>
+
+#include "FairMQSocket.h"
+
+class FairMQChannel
+{
+    friend class FairMQDevice;
+
+  public:
+    FairMQChannel();
+    FairMQChannel(const std::string& type, const std::string& method, const std::string& address);
+    virtual ~FairMQChannel();
+
+    bool ValidateChannel();
+
+    // Wrappers for the socket methods to simplify the usage of channels
+    int Send(FairMQMessage* msg, const std::string& flag = "");
+    int Send(FairMQMessage* msg, const int flags);
+    int Receive(FairMQMessage* msg, const std::string& flag = "");
+    int Receive(FairMQMessage* msg, const int flags);
+
+    std::string fType;
+    std::string fMethod;
+    std::string fAddress;
+    int fSndBufSize;
+    int fRcvBufSize;
+    int fRateLogging;
+
+    FairMQSocket* fSocket;
+
+  private:
+    std::string fChannelName;
+};
+
+#endif /* FAIRMQCHANNEL_H_ */