More convenient parseWith method.

[zealotrunner]

I think it'll be easier to use parseWith() if the method support following 'features'.

1. More 'straight-through' Now we have to

   $response = \Httpful\Request::get('http://www.example.com?p=1')
      ->parseWith(function($body) {
          // 
          return parsedMessage($body);
       })
       ->send();
   $message = $response->body;

   My Suggention

   $message = \Httpful\Request::get('http://www.example.com?p=1')
      ->xParseWith(function($body) {
          // 
          return parsedMessage($body);
       })
       ->send();

2. Pass $url directly in Now we have to

   $url = 'http://www.example.com?p=1';
   $response = \Httpful\Request::get($url)
      ->parseWith(function($body) use($url) {
          // 
          return parsedMessage($body, $url);
       })
       ->send();

   My Suggention

   $response = \Httpful\Request::get('http://www.example.com?p=1')
      ->parseWith(function($body, $url) {
          // 
          return parsedMessage($body, $url);
       })
       ->send();

[evangelion1204]

In general it would be helpful to know the headers too. In case you need to handle things like uncompression.