move http and ota to lib/ for testing, add #pragma once include guards

.vscode/settings.json

         "streambuf": "cpp",
         "cinttypes": "cpp",
         "typeinfo": "cpp"
-    }
+    },
+    "python.pythonPath": "C:\\Users\\simon\\AppData\\Local\\Programs\\Python\\Python37\\python.exe"
 }

include/ota.h

-#ifndef __OTA_H
-#define __OTA_H
+#pragma once
 
 #include <ESP8266WiFi.h>
 #include <WiFiUdp.h>
   });
   ArduinoOTA.begin();
 
-}
-
-
-#endif // __OTA_H
+}

include/filesys.h → lib/httpserver/filesys.h

-#ifndef __FILESYS_H
-#define __FILESYS_H
+#pragma once
 
 #include <LittleFS.h>
 
 void appendFile(const char * path, const char * message);
 void renameFile(const char * path1, const char * path2);
 void deleteFile(const char * path);
-
-#endif // __FILESYS_H

include/httpserver.h → lib/httpserver/httpserver.h

-#ifndef __HTTPSERVER_H
-#define __HTTPSERVER_H
+#pragma once
 
 #include "filesys.h"
 #include <ESP8266WebServer.h>
 
-
 class HTTPServer : public ESP8266WebServer {
 private:
     const char* rootDir;
         return false;
     }
 };
-
-#endif // __HTTPSERVER_H

src/main.cpp

   #include "user_interface.h" 
 }
 // OTA & WEB
-#include "ota.h"
 #include "wifi_credentials.h"
+#include "ota.h"
 #include "httpserver.h"
 
 // BOARD