nodemcu, esp8266, ds18s20

Ok, I've just updated the module. Please could someone try:

var t = require("https://raw.githubusercontent.c­om/espruino/EspruinoDocs/master/devices/­DS18B20.js").connect(new OneWire(A1));
t.getTemp(console.log);

And see if it works on DS18S20 as well?

I hopefully tidied it up a lot so it uses OneWire a bit more efficiently. It also checks the CRC now, so verify isn't needed and has been removed - the minified code is a smidge smaller too.

Personally I'd be tempted to remove isPresent, since a call to getTemp will just return null now.