add link to arduinoWebSockets

Author: Links2004

README.md

@@ -194,6 +194,7 @@ Libraries that don't rely on low-level access to AVR registers should work well.
 - [NeoPixelBus](https://github.com/Makuna/NeoPixelBus) - Arduino NeoPixel library compatible with esp8266.
 - [RTC](https://github.com/Makuna/Rtc) - Arduino Library for Ds1307 & Ds3231 compatible with esp8266.
 - [Blynk](https://github.com/blynkkk/blynk-library) - easy IoT framework for Makers (check out the [Kickstarter page](http://tiny.cc/blynk-kick)).
+- [arduinoWebSockets](https://github.com/Links2004/arduinoWebSockets) - WebSocket Server and Client compatible with esp8266 (RFC6455)
 
 #### Upload via serial port ####
 Pick the correct serial port.