Selfupdater

- adds selfupdater. you can start it in the onscreen menu

src/MenuManager.cpp

@@ -250,7 +250,7 @@ void MenuManager_::selectButton()
         {
             currentState = AppTimeMenu;
         }
-        else if (menuIndex == 6) // Updater
+        else if (menuIndex == 6) // Updater 
         {
            FirmwareVersionCheck();
         }