Fix for "Connecting with authentication and SSL"

Opening a secure connection without specifying the "https://" in the hostname but using the "secure" option is shown in the Readme:

``` js
  var connection = new(cradle.Connection)('couch.io', 443, {
      secure: true,
      auth: { username: 'john', password: 'fha82l' }
  });
```

This, however, results in an SSL error. E.g.

```
[Error: 140735249709408:error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol:s23_clnt.c:766:]
```

This will now work without any errors.