Smooth connection and disconnection complete

The clients can connect and disconnect from the server with known no
issues. There is no way to shutdown the server yet, but it might be
possible to kick someone else from the server soon.

libs/common/defines.hpp

@@ -2,10 +2,13 @@
 #define DEFINES_HPP
 
 #include <chrono>
+#include <string>
 
 #define GAME_CHANNEL 0
 #define CHAT_CHANNEL 1
 
 typedef std::chrono::high_resolution_clock Clock;
 
+std::string itos(int i);
+
 #endif