add ssl library-ArduinoDuePolarSSLClient

README.md

@@ -118,6 +118,7 @@ A curated list of awesome Arduino hardwares, libraries and projects
 * [socket.io-arduino-client](https://github.com/billroy/socket.io-arduino-client) - A socket.io client for the Arduino Ethernet shield 
 * [Arduino-IPv6Stack](https://github.com/telecombretagne/Arduino-IPv6Stack) - IPv6 stack for Arduino and Xbee based on Contiki OS network stack 
 * [MQTT-SN-Arduino](https://github.com/boriz/MQTT-SN-Arduino) - Connecting mesh network to the MQTT broker and tunneling MQTT protocol over Websocket
+* [ArduinoDuePolarSSLClient](https://github.com/tomconte/ArduinoDuePolarSSLClient) - sample Arduino Due sketch connecting to a PolarSSL server using PSK authentication
 
 *Command line library*