Version v1.2.0 to add LittleFS for ESP32 and clean up compiler warnings

Major Releases v1.2.0

1. Add support to LittleFS for ESP32 using LittleFS_esp32 Library
2. Add support to MultiDetectDetector using ESP_MultiResetDetector Library. MultiDetectDetector feature to force Config Portal when configurable multi-reset is detected within predetermined time.
3. Clean-up all compiler warnings possible.
4. Add Table of Contents
5. Modify Version String
6. Add MRD-related examples.

Version v1.1.0 to add examples using Free-RTOS MultiTask to avoid blocking in operation.

Releases v1.1.0

1. Add examples using Free-RTOS MultiTask to avoid blocking in operation.
2. Add Version String.

Initial Release v1.0.16 to use ESPAsynchWebServer and sync with Blynk_WiFiManager

Releases v1.0.16

1. Initial coding to use ESPAsyncWebServer instead of (ESP8266)WebServer.
2. Bump up to v1.0.16 to sync with Blynk_WiFiManager library v1.0.16.