Added HTTP OTA updater for ESP32

Added Easter Egg
Improved ArduinoOTA stability on ESP8266
Added function that starts the AP if you press the button for 7 secs
Added yet unused methods for color conversion

wled00/src/dependencies/webserver/ESP8266HTTPUpdateServer.h

@@ -0,0 +1,74 @@
+#ifndef __HTTP_UPDATE_SERVER_H
+#define __HTTP_UPDATE_SERVER_H
+
+#ifdef ARDUINO_ARCH_ESP32
+class WebServer;
+
+class ESP8266HTTPUpdateServer
+{
+  private:
+    bool _serial_output;
+    WebServer *_server;
+    static const char *_serverIndex;
+    static const char *_failedResponse;
+    static const char *_successResponse;
+    char * _username;
+    char * _password;
+    bool _authenticated;
+  public:
+    ESP8266HTTPUpdateServer(bool serial_debug=false);
+
+    void setup(WebServer *server)
+    {
+      setup(server, NULL, NULL);
+    }
+
+    void setup(WebServer *server, const char * path)
+    {
+      setup(server, path, NULL, NULL);
+    }
+
+    void setup(WebServer *server, const char * username, const char * password)
+    {
+      setup(server, "/update", username, password);
+    }
+
+    void setup(WebServer *server, const char * path, const char * username, const char * password);
+};
+#else
+class ESP8266WebServer;
+
+class ESP8266HTTPUpdateServer
+{
+  private:
+    bool _serial_output;
+    ESP8266WebServer *_server;
+    static const char *_serverIndex;
+    static const char *_failedResponse;
+    static const char *_successResponse;
+    char * _username;
+    char * _password;
+    bool _authenticated;
+  public:
+    ESP8266HTTPUpdateServer(bool serial_debug=false);
+
+    void setup(ESP8266WebServer *server)
+    {
+      setup(server, NULL, NULL);
+    }
+
+    void setup(ESP8266WebServer *server, const char * path)
+    {
+      setup(server, path, NULL, NULL);
+    }
+
+    void setup(ESP8266WebServer *server, const char * username, const char * password)
+    {
+      setup(server, "/update", username, password);
+    }
+
+    void setup(ESP8266WebServer *server, const char * path, const char * username, const char * password);
+};
+#endif
+
+#endif