Fixed Node Example

Error beforehand:

C:\Users\me\Documents\compiled.js:28
req.writeHead(200, {'Content-Type': 'text/plain'});
    ^
TypeError: Object #<IncomingMessage> has no method 'writeHead'
    at Server.<anonymous> (C:\Users\me\Documents\compiled.js:28:5)
    at Server.EventEmitter.emit (events.js:98:17)
    at HTTPParser.parser.onIncoming (http.js:2108:12)
    at HTTPParser.parserOnHeadersComplete [as onHeadersComplete] (http.js:121:23
)
    at Socket.socket.ondata (http.js:1966:22)
    at TCP.onread (net.js:525:27)