Only request the headers of a URL
npm install request-headersRequests the headers of a URL and then aborts the request.
```
requestHeaders('https://foaas.herokuapp.com/you/finn/finn', function(err, statusCode, headers) {
console.log('Content type: ' + headers['content-type']);
});curli
It is similar to the npm module , but curli` uses the HEAD command,
which might be a better idea. However am not sure how well implemented HEAD
is across the web therefore I rather abort a GET.