Major Releases v1.4.0

### Major Releases v1.4.0

1. Fix staticIP not saved in examples. See [ESP32 static IP not saved after restarting the device](#19)
2. Add structures and functions to handle AP and STA IPs.
3. Add complex examples 
  * [Async_ConfigOnDRD_FS_MQTT_Ptr_Complex](examples/Async_ConfigOnDRD_FS_MQTT_Ptr_Complex) to demo usage of std::map
  * [Async_ConfigOnDRD_FS_MQTT_Ptr_Medium](examples/Async_ConfigOnDRD_FS_MQTT_Ptr_Medium).
4. Add simple minimal examples 
  * [Async_ConfigOnDRD_ESP32_minimal](examples/Async_ConfigOnDRD_ESP32_minimal)
  * [Async_ConfigOnDRD_ESP8266_minimal](examples/Async_ConfigOnDRD_ESP8266_minimal)
  * [Async_AutoConnect_ESP32_minimal](examples/Async_AutoConnect_ESP32_minimal)
  * [Async_AutoConnect_ESP8266_minimal](examples/Async_AutoConnect_ESP8266_minimal)
5. Modify Version String
6. Add Table of Contents

Author: khoih-prog

README.md

@@ -1925,7 +1925,7 @@ ESPAsync_wifiManager.setRemoveDuplicateAPs(false);
  1. [Async_AutoConnect_ESP32_minimal](examples/Async_AutoConnect_ESP32_minimal)
  2. [Async_AutoConnect_ESP8266_minimal](examples/Async_AutoConnect_ESP8266_minimal)
  3. [Async_ConfigOnDRD_ESP32_minimal](examples/Async_ConfigOnDRD_ESP32_minimal) 
- 4. [Async_ConfigOnDRD_ESP8266_minimal](examples/)
+ 4. [Async_ConfigOnDRD_ESP8266_minimal](examples/Async_ConfigOnDRD_ESP8266_minimal)
 
 
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