add nanomsg implementations + use factory for nanomsg + lots of small stuff

fairmq/FairMQContextZMQ.h

@@ -0,0 +1,25 @@
+/**
+ * FairMQContext.h
+ *
+ * @since 2012-12-05
+ * @author D. Klein, A. Rybalchenko
+ */
+
+#ifndef FAIRMQCONTEXTZMQ_H_
+#define FAIRMQCONTEXTZMQ_H_
+
+#include <zmq.h>
+
+class FairMQContextZMQ
+{
+  public:
+    FairMQContextZMQ(int numIoThreads);
+    virtual ~FairMQContextZMQ();
+    void* GetContext();
+    void Close();
+
+  private:
+    void* fContext;
+};
+
+#endif /* FAIRMQCONTEXTZMQ_H_ */