devices can be created via API

include/zmq.hpp

@@ -56,6 +56,13 @@ namespace zmq
         return rc;
     }
 
+    inline void device (int device_, void * insocket_, void* outsocket_)
+    {
+        int rc = zmq_device (device_, insocket_, outsocket_);
+        if (rc != 0)
+            throw error_t ();
+    }
+
     class message_t : private zmq_msg_t
     {
         friend class socket_t;