Updated TODO list

Removed windows specific files since the code is the same for linux
UdpClient: added basic methods to interact with the variables of that class, added initialization and started with sending and receiving messages
UdpServer: added initialization and basic variables
Utility: added a bunch of methods to the StringConverter utility class
VoidNetClientAPI: SendMessage now checks if message is not an handshake

include/UdpServer.hpp

@@ -0,0 +1,34 @@
+#ifndef UDP_SERVER_HPP
+#define UDP_SERVER_HPP
+
+#ifdef _MSC_VER
+#pragma once
+#endif
+
+#include "Defs.hpp"
+#include "UdpClient.hpp"
+
+#include <string>
+#include <vector>
+
+struct UdpServer
+{
+private:
+	bool initialize(uint16 port = default_server_port);
+
+	uint16 allocate_id();
+
+	void shutdown_internal();
+
+	bool initialized = false;
+	bool running = false;
+
+	uint16 max_connections = 0;
+
+	std::vector<UdpClient> clients;
+
+	SOCKET server_udp_socket = INVALID_SOCKET;
+	struct sockaddr_in server;
+};
+
+#endif