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

.vscode/settings.json

@@ -48,5 +48,6 @@
         "streambuf": "cpp",
         "cinttypes": "cpp",
         "typeinfo": "cpp"
-    }
+    },
+    "python.pythonPath": "C:\\Users\\simon\\AppData\\Local\\Programs\\Python\\Python37\\python.exe"
 }