* Electron version: 1.6.1
* Operating system: All

### Expected behavior

It should be possible, when using net.request, to set redirection options. The `ClientRequest` constructor options should contain a "redirect" attribute, with possible values "follow", "error" or "manual" (like window.fetch), and defaulting to "follow".

Also, when a redirection did happen, it should be possible to know it did, and at least get the URL to which we were redirect (for example as an attribute of IncomingMessage).

### Actual behavior

It is not possible to stop redirections from happening, or even to know that it happened and get the new URL.

### How to reproduce

Use net.request on any URL that does a redirect.

atom/browser/net/atom_url_request.cc
const base::string16& password) const {
  DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
  if (!request_) {
    return;
  }
  request_->SetAuth(net::AuthCredentials(username, password));
}
void AtomURLRequest::DoCancelAuth() const {
  DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
  if (!request_) {
    return;
  }
  request_->CancelAuth();
}
void AtomURLRequest::DoCancelWithError(const std::string& error,
                                       bool isRequestError) {
  DoCancel();
  content::BrowserThread::PostTask(
      content::BrowserThread::UI, FROM_HERE,
      base::Bind(&AtomURLRequest::InformDelegateErrorOccured, this, error,
                 isRequestError));
}
void AtomURLRequest::DoSetLoadFlags(int flags) const {
  DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
  if (!request_) {
    return;
  }
  request_->SetLoadFlags(request_->load_flags() | flags);
}
void AtomURLRequest::OnAuthRequired(net::URLRequest* request,