HTTPS support on Pico!

Partially ported AWS IoT library.
As there is currently no support for client-cert X.509 auth yet on Espruino, use with socat.

Created pull requests on github:
github.com/espruino/EspruinoDocs/pull/19­3
github.com/espruino/EspruinoDocs/pull/19­4

Managed to connect to AWS IoT by offloading tls to socat.

root@192.168.2.1>
socat tcp-listen:8883,fork,reuseaddr openssl-connect:A4B6O0T19QBXJ.iot.ap-nor­theast-1.amazonaws.com:8883,method=TLS1.­2,cert="$HOME/Downloads/61a57a0f66-certi­ficate.pem.crt",key="$HOME/Downloads/61a­57a0f66-private.pem.key",cafile="$HOME/D­ownloads/VeriSign-Class 3-Public-Primary-Certification-Authority­-G5.pem"

function initEthernet(cb) {
  SPI2.setup({ mosi:B15, miso:B14, sck:B13 });
  var eth = require("WIZnet").connect(SPI2, B10);
  eth.setIP();
  global.eth = eth;
  if('function' === typeof cb){cb();}
}

function initMQTT(cb) {
  var mqtt = require("MQTT").create("192.168.2.1", { port: 8883 });
  mqtt.on('connected', function() {
    mqtt.subscribe("$aws/things/+/shadow/#")­;
    mqtt.on('publish', function (pub) {
      console.log("topic: "+pub.topic);
      console.log("message: "+pub.message);
    });
    if('function' === typeof cb){cb();}
  });
  mqtt.connect();
  global.mqtt = mqtt;
}

function initAwsIotDevice(cb) {
  var awsIot = {};
  awsIot.device = require('aws-iot-device-sdk-device');
  var device = awsIot.device({ host: '192.168.2.1', port: 8883 });

  device.on('connect', function() {
    console.log('connect');
    device.subscribe('$aws/things/+/shadow/#­');
    device.publish('$aws/things/espruino1/sh­adow/test', JSON.stringify({test_data:1}));
    if('function' === typeof cb){cb();}
  });

  device.on('message', function(topic, payload) {
    console.log('message', topic, payload.toString());
  });
}

function initAwsIotThingShadow(cb) {
  var awsIot = {};
  awsIot.thingShadow = require('aws-iot-device-sdk-thing');

  var thingShadows = awsIot.thingShadow({ host: '192.168.2.1', port: 8883 });
  var rgbLedLampState = {"state":{"desired":{"red":187,"green":1­14,"blue":222}}};

  thingShadows.on('connect', function() {
    thingShadows.register('espruino1');
  });
}

//E.on('init', initEthernet);
//E.on('init', initMQTT);
//save();
initEthernet(function() {
  console.log(global.eth.getIP());
  initMQTT(function() {
    console.log("AWS IoT Ready");
  });
});

root@192.168.2.1>
mosquitto_pub -h 192.168.2.1 -p 8883 -d -t '$aws/things/espruino1/shadow/test' -m "Hello World"

AWS IoT device library is working.
Will continue to port AWS IoT shadow things library from nodejs.