split network code into extra file

network.h

@@ -0,0 +1,9 @@
+#define SERVER "::1"
+#define PORT 49000
+
+#define COMMAND_BUFFER 256
+
+char* printable(char *str);
+int sendCommand(int sock, char *cmd);
+int connectXPlane(char *addr, int port);
+int disconnectXPlane(int sock);