Added linux includes for networking

TcpClient: added close_connection to shutdown the connection on both send and receive
TcpServer: changed clients list initialization from constructors to using the reserve function

src/TcpClient.cpp

@@ -60,8 +60,13 @@ void TcpClient::receive_data(TcpClient *client)
 			{
 				if (message.tag == ConnectTag) // some user has connected - not us, never
 					std::async(std::launch::async, client->OnConnect, message.sender);
-				else if (message.tag == DisconnectTag || message.tag == Close) // some user has disconnected, it can be us
+				else if (message.tag == DisconnectTag) // some user has disconnected, it can be us
 					std::async(std::launch::async, client->OnDisconnect, message.sender);
+				else if (message.tag == Close)
+				{
+					std::async(std::launch::async, client->OnDisconnect, message.sender);
+					close_connection(client);
+				}
 			}
 			else
 				std::async(std::launch::async, client->OnMessage, message.sender, message.tag, message.subject, message.data); // we received data
@@ -228,6 +233,12 @@ bool TcpClient::send_network_message(const NetworkMessage &message, TcpClient *c
 	return bytes_sent == SOCKET_ERROR || bytes_sent != lenght || WSAGetLastError() != 0;
 }
 
+void TcpClient::close_connection(TcpClient * client)
+{
+	shutdown(client->tcp_socket, SD_BOTH);
+	closesocket(client->tcp_socket);
+}
+
 bool TcpClient::SendBytes(const std::vector<byte>& bytes)
 {
 	int32 bytes_sent = send(tcp_socket, reinterpret_cast<const char*>(bytes.data()), bytes.size(), 0);

src/TcpServer.cpp

@@ -10,13 +10,13 @@
 TcpServer::TcpServer()
 {
 	initialize(); // initialize with the default port
-	clients = std::vector<TcpClient>(max_connections);
+	clients.reserve(max_connections);
 }
 
 TcpServer::TcpServer(uint16 port)
 {
 	initialize(port);
-	clients = std::vector<TcpClient>(max_connections);
+	clients.reserve(max_connections);
 }
 
 TcpServer::~TcpServer()