* 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/api/atom_api_url_request.cc
return request_state_.NotStarted();
}
bool URLRequest::Finished() const {
  return request_state_.Finished();
}
bool URLRequest::Canceled() const {
  return request_state_.Canceled();
}
bool URLRequest::Write(scoped_refptr<const net::IOBufferWithSize> buffer,
                       bool is_last) {
  if (request_state_.Canceled() || request_state_.Failed() ||
      request_state_.Finished() || request_state_.Closed()) {
    return false;
  }
  if (request_state_.NotStarted()) {
    request_state_.SetFlag(RequestStateFlags::kStarted);
    
    Pin();
  }
  if (is_last) {
    request_state_.SetFlag(RequestStateFlags::kFinished);
    EmitRequestEvent(true, "finish");
  }
  DCHECK(atom_request_);
  if (atom_request_) {
    return atom_request_->Write(buffer, is_last);
  }
  return false;
}
void URLRequest::Cancel() {