v1.1.2

### Releases v1.1.2

1. Clean-up all compiler warnings possible.
2. Add MQTT examples
3. Add Version String 
4. Add Table of Contents

Author: khoih-prog

README.md

@@ -11,7 +11,7 @@
 
 ## Table of Contents
 
-* [Why do we need this ESP8266_AT_WebServer library](#why-do-we-need-this-wifiwebserver-library)
+* [Why do we need this ESP8266_AT_WebServer library](#why-do-we-need-this-esp8266_at_webserver-library)
   * [Features](#features)
   * [Currently Supported Boards](#currently-supported-boards)
   * [Currently Supported AT-command shields](#currently-supported-at-command-shields)