tcpchannel should also be movable

include/amqpcpp/channel.h

@@ -24,7 +24,7 @@ private:
      *  The implementation for the channel
      *  @var    std::unique_ptr<ChannelImpl>
      */
-    std::unique_ptr<ChannelImpl> _implementation;
+    std::shared_ptr<ChannelImpl> _implementation;
 
 public:
     /**

include/amqpcpp/linux_tcp/tcpchannel.h

@@ -38,6 +38,18 @@ public:
      *  Destructor
      */
     virtual ~TcpChannel() {}
+
+    /**
+     *  Copying is not allowed.
+     *  @param  other
+     */
+    TcpChannel(const TcpChannel &other) = delete;
+
+    /**
+     *  But movement is allowed
+     *  @param  other
+     */
+    TcpChannel(TcpChannel &&other) = default;
 };
 
 /**