CHG: changed the return val from the tcp classes to string

include/DirectCommunicationClient.hpp

@@ -25,7 +25,7 @@ namespace DirectCommunication
             ~DirectCommunicationClient();
 
             void sendMessage(std::string msg);
-            std::unique_ptr<std::string> getLatestMessage();
+            std::string getLatestMessage();
 
         private:
             ushort port_;

include/DirectCommunicationServer.hpp

@@ -25,7 +25,7 @@ namespace DirectCommunication
             ~DirectCommunicationServer();
 
             void sendMessage(std::string msg);
-            std::unique_ptr<std::string> getLatestMessage();
+            std::string getLatestMessage();
 
             int countClients();