impOS36 - thermistor readings

First, you can see what’s changed with the new impOS release here: https://electricimp.com/docs/releasenotes/releases/release36/

You can use imp.getsoftwareversion() to determine which version a given device is running. For example, I add the following to all my development code and call it early:

function bootMessage() {
    local a = split(imp.getsoftwareversion(), "-");
    server.log("impOS version " + a[2]);
    local i = imp.net.info();
    local w = i.interface[i.active];
    local s = ("connectedssid" in w) ? w.connectedssid : w.ssid;
    local t = (w.type == "wifi") ? "Connected by WiFi on SSID \"" + s + "\"" : "Ethernet";
    server.log(t + " with IP address " + i.ipv4.address);
}